Johnson / Evinrude thermostat replacement

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[@leebatt7964]

When i first started as a commercial refrigeration mechanic, my boss had me play around with some old junk compressors, compression fittings and such to get a feel for how and when bolts would shear or strip. It was a really valuable exercise.

[@alangrant5278]

I replaced my thermostats just before the danpemic for $20 each. Now they are $70 each. Thanks Chain.

[@bryandurban7104]

Thanks a lot Stu. I have just changed my stat in my 25hp but unfortunately lost three bolts. As an engineer (although I’m only learning about boats) I was taught a trick, years ago for cleaning out bolt holes. If you take a bolt of the same size (I had some old ones left over after the water pump fix), cut a slot along the length of it and another on the other side, you can use it like a tap to remove all the crud. This also has the advantage of you not having to use your best taps in cruddy holes. It can also be used in an old nut as well, where wire brushing is not appropriate. Thanks for your videos. You are really helping me out with my boat education.

[@DangarMarine]

Yep, making your own thread chasers is a great way to go.

[@James-eq8fs]

You do some of the best boat repair videos on KZbin good job. I am a boat mechanic in the Untied States on the Great Lakes and over my 20 plus years I have worked at dealerships and for myself as an independent shop. What I will use in place of OMC Gasket Sealing Compound or Mercury's Perfect Seal if I don't have them is Permatex Aviation Form-A-Gasket No. 3 Sealant . The Permatex Form-A-Gasket is basically the same thing and you can get it, a least in the USA at any auto parts store, Amazon, Walmart, etc. 100s of engines never an issues. I will also put it on the bolt treads in a repair like this one and use it like a type of anti-seize. Thank you gain for the video.

[@DangarMarine]

Hey James, great tip about using Permatex in place of OMC Gasket Sealing Compound. It's also very interesting to hear that it also works as an antiseize. I normally quite like to use this stuff on bolts, even though I was slack and didn't use it in this video ;) www.permatex.com/products/lubricants/specialty-lubricants-anti-seize/permatex-anti-seize-lubricant-2/

[@James-eq8fs]

I don't normally use ant seize on to many bolts. In a repair like this video I will use the Permatex Form-A-Gasket on the gasket surface and the bolts themselves. Even though I got it easy because most of my stuff is fresh water corrosion and seized bolts on things like Johnson and Evinrude gearcases is still a problem. So I will coat an entire gearcase mounting bolt with gasket compound and it seems to work well even years latter. Thanks again for your great work.

[@youngdreams55]

I think Stu, if you going to work on old Evinrudes and Johnsons you might need to get more SAE tools. Thanks for the videos, I have learned a lot about outboards

[@CorkRebel78]

Hello from Ireland Stu, Great video as always. On easter weekend my 115hp oceanpro will be getting the first turn of the key for the season. Fingers crossed she fires up. Will keep you posted:)

[@DangarMarine]

Thanks mate. Good luck with your first run. Glad to hear the warm(er) weather is coming!

[@Neistrup]

hi Mr Dangar I have many years ago had a very sad encounter,as a young engineer, with a non salvageable evinrude 4 HP that had been into the drink. Since following your allways positive videos i have taken on a boat project and purchesed a Tohatsu 4 stroke for it, so it is easy to see that you should keep up the work you do well ! Cheers from the other side of the world

[@DangarMarine]

Thanks mate. Glad to hear you have got yourself another boat project. :)

[@BoudinMessiah88]

I am changing the thermostat on my 1994 Johnson 25 and I wanted to thank you....I bought the motor for 150 bucks and have been using it almost every weekend the past year. Your videos made it a lot easier to get it running. I'd have had hell redoing the seals in the lower unit.

[@terrelldean9481]

InstaBlaster...

[@Shokenryu]

I have a 1993 Johnson Outboard 9.9 J10RETM and having problems finding the right thermostat. Many websites wants me to buy the thermostat piece by peice and usually missing the diaphragm. Please help if you can. 🙏

[@frankdavis3486]

Changed that first. I found the problem. It was clogged with impeller pieces. I cleared it with a garden hose. Thanks buddy.

[@prevost8686]

I am so glad I run freshwater only. I still see many old Johnson outboards that run great and look like new. The 15hp was one of their most popular models and there are still thousands running great today. Sad that OMC fell on hard times .

[@DangarMarine]

It is sad when companies that were so successful don't manage to survive. It's great that there are so of the outboards are still out there getting around though. :)

[@jimgibson9947]

Very useful video, I'm presently changing the thermostat on my Johnson 1992 25 horse! I also replaced the water pump by watching one of your videos! Great vids and saved me a ton of money! Thanks a bunch!! Have a good one !!

[@DangarMarine]

Glad it helped!

[@rodvasquez2747]

Another great video. The gasket compound also goes on the bolts and helps with corrosion. But sometimes you gotta use what you have on hand. A+ job

[@DangarMarine]

Thanks Rod!

[@xXBocephusXx]

Another great video Stu!

[@DangarMarine]

Thanks mate. :)

[@gstep51]

I always look forward to your next video. Your common sense approach to maintenance as well as your tips and tricks all go to make what could be a daunting task some thing that most folks feel they can accomplish. That is the mark of a truly good instructor. Thanks for another one!!!

[@DangarMarine]

Thanks Greg, glad the video helped you. :)

[@michaelekberg2661]

Great as Always, Thank you. See forward to the video about Broken bolts, kind of my nemesis! 😁

[@DangarMarine]

Thanks Michael, I think they get everyone from time to time...

[@larrymoody9183]

If no tap is available to chase threads, you can take a spare bolt of the same thread spec and use a dremel or file to cut a small gun flute on the end for the first few threads. Works great for cleaning out gunk and debris from threaded holes.

[@DangarMarine]

Hey Larry, yes, modifying a bolt is a great way to go.

[@Chris-eh3du]

Love these videos!

[@DangarMarine]

Thanks Chris!

[@crazed8486]

Thanks stu keep the new vids coming

[@DangarMarine]

Thanks Robert, will do. :)

[@josepeixoto3384]

FANTASTIC; you're the very best,thanks

[@johnwills9303]

Great video Stu. The fact that the whole plate had to come off to access the thermostat scared me as I thought at least one of those bolts would have minced off. Pheeewwww. For a fairly routine service activity it is a shame that many bolts need to come away. Thanks for sharing

[@DangarMarine]

Yeah, I'm sure it puts a lot of people of changing their thermostat having it so hard to get to. Not a great design.

[@googleplusisdead]

And even worse on my '84 85hp Evinrude. Thermostat is at the bottom of the head and don't need to remove the head, BUT, you can NOT get to the bolts with the powerhead in place. Just NOT enough room. REALLY bad design. There are videos about folks cutting the bottom cover to make room for wrench and access to the thermostat, as well as drilling large holes for socket/extension reach. I think the latter is the way I'll go. Later models moved the thermostat to the top of the block. RichE

[@dougbradbury6426]

Great video Stu 👍

[@DangarMarine]

Thanks Doug!

[@alexvidal8517]

Hey there let me start by saying I love your videos super informative thank you very much

[@dwpetty3723]

Nice timing on the video, I need to do my evinrude 9.9 thermostat.

[@DangarMarine]

Good luck!

[@MADTrolleyMotorsport]

Watched this a week ago, and been out a few times over weekend, water temp was quite cold today and was stopping and starting alot, my johnson 25 was running like cold start!! I thought i bet the thermostat was stuck open and bam it was cheers STU was a breeze after watching this

[@DangarMarine]

Glad to hear you found the problem. :)

[@xxkodiakx]

thanks for posting this !

[@DangarMarine]

Welcome. :)

[@MurrayEstes]

On the seventh day this guy saved all of us!

[@elizabethreed9926]

Again, an excellent video.., I use brass gun cleaning brushes for cleaning inner threads, many calibers available and inexpensive

[@DangarMarine]

Thanks mate. I might be able to find some online, but there aren't really any gun shops in Sydney.

[@frankdavis3486]

big help. Thanks Man. Got a 25 Evenrude that isnt pumping water. Ran engine through a muddy spot near boat launch and it picked up mud.

[@KeepYourPawsOffMe]

Maybe you already checked but you might need a new impeller that's in the lower unit. Mud can chew it up.

[@acsmanny70]

Good video mate like always. Good day.

[@DangarMarine]

Thanks Manny!

[@AndrewLawlin]

So I just got the same motor and when I started it for the first time it seems to be dripping from this gasket... near the bottom, I was wondering if I could run it with it dripping and not harm anything till I get the part in later for the gasket/ thermostat? Will It overheat? Its Pumping water through the tell tail and seems to be fine other than that!

[@richardcranium5839]

man thats lucky. and on a monday even!!!! i keep an assortment of bolts that ive cut the heads off and cut a screwdriver slot in to use as alignment dowels for things like holding the gasket in place and that plate. once the other bolts are started back them out and put the right ones in. frees up another hand.

[@DangarMarine]

I really like that idea for hanging gaskets, great tip! I'll have to start getting a collection going. :)

[@AR1G3]

I do that too!! Excellent trick for aligning gaskets, makes it so much easier!

[@ronpowell2373]

never heard or seen that idea , but I like it . Thanks for tip. Pity I didn't know about it a few years ago, working on the old Windsor 351, that idea would have made getting the headers on a lot easier! Even in the engine bay of an XW those Windsors used every bit of space between the shock towers!

[@Fireship1]

Awesome video Stu. This is getting done this spring on my Evinrude 48. Its a 1996 and I don’t know if it’s ever been done. I hope I have the same luck as you with the bolt situation. Broken bolts are the pits!

[@DangarMarine]

Thanks Jack. I hope the gods of easy-to-remove bolts are smiling on you when you do the job. :)

[@aaronstrickland1585]

as far as a thread chase or tap to clean out the threads just make your own, i take a bolt and cut a (+) plus sign into the very end of the bolt with a small keen hacksaw blade and then apply small amount of cutting oil to the threads of the bolt and run it in the hole by hand with open end wrench. acts just like thread chase. when your done use a new bolt to reassemble

[@DangarMarine]

A few people have mentioned making their own, I'll have to experiment with all the different designs suggested.

[@joshuayoung3921]

Hey Stu thank you for the video. I have a 1982 15hp Johnson electric start outboard. I had a hell of a time getting the water cover off once the bolts were removed due to the compression of the thermostat spring and space. Do you have any suggestions for when I put the new thermostat and thermostat spring in for reassembly of the water cover. Thank you

[@chrisellwood3523]

Check your motor has a thermostat in it before ordering parts. I took my front plate off to see the previous owner had removed the thermostat. So I had to wait another 2 weeks for rings and spring to arrive

[@googleplusisdead]

Don't know if you've heard of youtube donyboy73, but he likes to use a scotchbright pad on drill or other to clean up the gasket surfaces on aluminum (and steel/cast iron). Works great, easy (if you can get to the surface, of course), and won't mar the aluminum (unless you go crazy with pressure, etc.). Also, quick way to make a thread chaser (not a tap) is to get a bolt, preferably grade 5, the same size, then just cut a slot down the middle! Edges clean the threads, and allow somewhere for the crud to go. And probably already commented on, but don't forget to reattach the tell-tale... :) RichE

[@DangarMarine]

I have seen a few of donyboy73's videos, I like them. It's funny you should mention Scotchbright pads as I was just talking to Mark who designed the boat I'm building about how good they are for roughing up epoxy for recoating too. I like your tip for a home made thread chaser too!

[@rok7980]

Stu, great video. I just took the head cover off my 87 Evinrude 88hp. Broke several bolts off and took forever to get them out. Since those were so bad I assume I should quit and not attempt the head bolts since they are much longer and probably have the same corrosion problem? Thoughts. Thanks.

[@robertandersson68]

Hello Dangard! Robert from Sweden 😊

[@DangarMarine]

Hi Robert! :)

[@HoustonR6ryda]

great video

[@mikepoint4983]

What a great channel , would my 96 115 ocean pro be a similar repair ? , I bought this project a few weeks back . I just changed out the original starter and solenoid and plugs . I feel changing the thermostat would be a good preventative maintenance idea while it’s out of the water . Keep up the great work . Cheers

[@bobpitt1261]

Another quality video, thanks Stu. Quick question, do you do much work on inboards or diesels?

[@DangarMarine]

Thanks Bob. I do from time to time work on yacht diesels, but almost new inboard petrol.

[@ourboatproject29]

Hi I did this and followed what you did. When I took the cover off there was no spring and no thermostat, I’m guess it does need a thermostat and someone has previously removed it. Once I started it still no water came out where the thermostat should be, I have changed the impeller as well, Do you think it Might be the water pump? Trying to troubleshoot what it is and learn at the same time. Thank you Ps: I have the same outboard.

[@wayneberry8703]

Great job.

[@Fleischmann773]

Whats that spray he/you use on the gasket?

[@dnixon1974dn]

Great info good vid . thumbs up mate..

[@DangarMarine]

Thanks Darren.

[@TimsWorkshopTJY]

Hi Stu, I would like to ad a temp gauge to the boat to keep an eye out for overheating before damage down the road. I see you have not filmed one yet and thought it would be a good one in the future. There is only one on a merc so will do one myself once I'm successful.

[@DangarMarine]

Hey Tim. Yes, I have had that on the list for a while. I saw one where the sensor was drilled into the block close to the thermostat and it seemed to work well.

[@tlaroux]

Since this outboard is very similar to my 28spl would you answer this question:. Is the power pack beneath the flywheel? Looks like I must take it off to get to the powerpack to do some troubleshooting.

[@alangrant5278]

Bloody useful as always. Wonder if plugging the spark plug holes would be worth it to keep any junk out of the cylinder? Maybe pop the plugs back in while cleanup up the corrosion?

[@darrylryder8114]

if you can get your hands on Schaeffer's Penetro90 I would urge you to. yes its expensive but in the long run it will save you time, aggravation and money. I use it on my old 1973 20 hp mercury which lived in brackish water here in South Louisiana. Only had one head bolt break.

[@CarAholic86]

What kind of gasket sealant is that in the spray can?

[@fishyhobby3697]

Is it worth trying to attempt to snake or flush the cooling channels in some fashion?

[@BIGTONO1]

Hey mate love the vids, been super helpful to me since owning a Johnson motor! Recently it stopped squirting water out of the tell tale and I blew on the hose and felt something pop out of it, the water pump was fairly new so I pulled the thermostat cover plate off (after snapping a few bolts, luckily they were the higher ones easier to get to) and it was corroded as buggery thermostat blocked and few solid clumps and stones etc iv just finished cleaning it up and ready to fix the snapped bolts and put new thermostat and gasket on but I was wondering if there is anywhere else I should check/ clean for blockages as in maybe the exhaust cover where the tell tale connects to? Or should it be right? Also can I start the motor with the cover off just to make sure the water is pumping now or would you not recommend that? Cheers mate

[@drlangattx3dotnet]

Thanks Stu

[@DangarMarine]

You're welcome. :)

[@kermets]

Yep you were lucky with those head bolts.....my old 73 snapped half the bolts off took two days to heat them up and slowly remove them so not to damage the thread

[@DangarMarine]

Yes, I definitely was lucky with that outboard, that's for sure.

[@fuzzyfultz]

Awesome ! Thank you.

[@DangerBRA]

Hello, I have a Jonson 70 hp 3cil engine 1996, I will open the cap what pressure on the torque wrench? thx

[@bassman8990]

I have a 1998 Johnson 30hp. Ive changed the the impeller & checked the tell tale hose going to motor & the water tube going to the lower unit & all are clear & still not getting water out if the tell tale. Would the thermostat keep the watwr from coming out of the pee hole?

[@kennethshattuck4689]

Hello and thanks for all your videos. I have a yamaha 85hp 2 stroke outboard. My question : Is that that the locals around here(Honduras) will run their outboards without thermostat in them cause the Ocean is so warm. What is your opinion on running my motor without a thermostat?

[@pete61772]

hi there I'm a big fan of your Channel I look at your videos as a go to when I need help with my motor your the best at what u do keep it up man can u do a video of a stator and how it works on a 30 horsepower Johnson Evinrude

[@DangarMarine]

Thanks Pete. We'll definitely be taking a look at the stator on this motor.

[@pete61772]

Dangar Marine cool man thanks for the reply so fast that made my day. keep up the good work

[@floydmay1230]

Hi Mate love the vids, Very helpful! Any chance you could do a link and sync vid on the 30hp Johnson? cheers

[@chucksmith5002]

Thanks for the video . But I don`t know if you work on boat motors all the time but if you do you should have all the tools needed .

[@philbyalby]

G'day Stu, I've got a '96 Evinrude 40hp which has a busted a thermostat bolt. Would be very interested to see how i could best go about getting the shaft out without stuffing the thread..Love your vids mate!

[@DangarMarine]

I'll try to get onto that video sooner rather than later.

[@SonnyGTA]

I thought this was DANGER Marine!

[@garettpatria]

I have a 1994 Evinrude E30ELERM that recently starting running hot after only a 20min cruise. As soon as the alarm buzzed, I shut it down and now it won't start (no spark it seems). Is there a "thermal fuse" or something? It seems unlikely that it was hot long enough to cause any real damage. Obviously, I need to troubleshoot why it ran hot suddenly in the first place (e.g. thermostat, etc,), but what would cause it to not start you think?

[@alexvidal8517]

I have a question in hopes of maybe some feedback I have a Johnson 1998 225 Ocean Runner seems to be running rich the motor has no thermostats does that affect the fuel mix is it ok to run without thermostats and how many turns on the mixture screw do you recommend the motor runs fine wide open but then drowns itself out when coming to an idle and shuts off gives me a hard time to start afterwards do to it flooding once I get it running again I get a bunch of smoke and excess fuel in the water again runs fine wide open throttle but when coming down idle super rough or shuts off

[@glen7850]

At first I thought the design of the johnson evinrude thermostat was ass backwards but it is not. I found out after taking off the cover of a 1985 25 hp johnson that was used in salt water, that it was packed with salt jam packed. changing the thermostat makes also allows cleaning where salt will most likely deposit. A great design now that I see the logic.

[@AR1G3]

You probably didn't have a spare bolt, but if you had you could have cut a slot across the threads and use it as a thread cleaner. That way you wouldn't have to buy a complete imperial tap set, but you could still clean those threads out

[@DangarMarine]

You're right in that I didn't have a spare imperial bolt, but I do like the idea of making a thread chaser. I've got some threaded rod to make a puller for the bearing carrier so I show making one to clean those holes out. They need even more cleaning because they are empty and below the water line.

[@Marie-sc1fv]

Thank you sooooo much 😊👍

[@diegohoh5335]

Con pernos nuevos ,79 Newton con pernos viejos un poco más por el estiramiento buen video!!

[@downsouthsafaris6788]

Hey thanks for the video. I’ve an old ‘90’s 30hp Evinrude it’s fiscally ridiculous to service them a replacement water pump costs South African Rand2000 plus labour - I brought the engine used for R5000. After a 4 hour blast in the ocean at 3/4 thrittle (20kmh) it cut out and required a “time out” our coastline is not conducive to unreliable motors. A new engine costs R50,000 and is a much heavier 4 stroke. So self maintenance is the only way with these engines.

[@DangarMarine]

Yes, only motors really aren't worth keeping unless you are going to work on them yourself. Many mechanics won't even agree to touch them at any cost.

[@grahamneil8114]

One thing I like to do on any suspect bolts these days is just before reinserting brush on just a Tiny amount of Anti - Seize on the bolts. If it's not you then help out the next guy.

[@DangarMarine]

Yep, a bit of antiseize on the bolts is a great way to go.

[@tnbass2833]

I've had a few evinrues/johnsons and have had issues with the thermostat on everyone of them.Now what I am going to say net is just what I've done in the past and I'm not saying it is correct.But what I have done in the past was use a restrictor in place of the thermostat and it seemed to work.

[@DangarMarine]

To be honest, I've seen plenty of outboards running without a thermostat at all. In theory they will never run at the right temperature which isn't great, but it's a lot better than over heating.

[@Bponce9]

Can you use the copper gasket sealer or known as copper spray a gasket stuff?

[@TimsWorkshopTJY]

I think my next video will be changing a steering cable. Oh my Dangar shirt is coming and so will a picture to you👌

[@DangarMarine]

Thanks Tim, looking forward to getting your photo on the wall!

[@stevenbulygo1341]

I have a 1995 evinrude johnson 88hp v4 I replaced water pump and thermostats. I have ear muffs hooked up plenty of water pressure going to the leg while running and I have water coming out of the spout but when she warms up after ten mins off running it's starts to spit water on and off. Is it true that the earmuffs don't apply enough water for these motors and that's why I'm spitting water on and off

[@79Satd]

Another great video. Where can I find the specific torque settings for water pump, thermostatcover, etc? I have a seloc manual but it only provides general torque settings by bolt size.

[@DangarMarine]

You can often find the OEM manual at tradebit.com or readmanual.com

[@peterjensen6844]

Stu - I have this task on my list. But what should I look out for with the pressure relief valve (popoff)? It's a foreign concept to me and not sure what to look at to know if it needs replacing.

[@DangarMarine]

Most small outboards don't have them so I'm not hugely familiar with them either. I presume just clean and moving freely.

[@bassman8990]

Know anywhere to find the bolt sequence to put them back in as well as which to tighten in what sequence. I have the same motor & its still not peeing water after an impeller change. There is no blockage in tell tale hose, water tube in lower or where the tell tale hose connects into the powethead. Wouldnt the water still pee out if the tell tale no matter if thermostat is good or bad? Also the bolt thats directly under the thermostat isnt a 3/8 on my motor, the top 2 above the thermostat are. Could it be some odd size between 3/8 & 7/16ths? There is no room to put a socket on the bolt directly under the thermostat

[@merlin1346]

great vid.

[@DangarMarine]

Thanks!

[@robertsweet4112]

Can you add a tale tell to the thermostat cover or where the temp sensor is?

[@Indietro25]

Hi where i need connect temp sensor wire I same engine 30 hp 2 stroke Johnson please help thanks very much.

[@boatandrvrestorationtravel8846]

I have a 1976 johnson model 70el76d seahorse 70hp, dont see a peehole by engine compartment some say that this engine model doesnt have it. My 1st time having this kind of engine how does water flow on it and where does it come out? Thanks

[@johndibiase882]

ok my bottom 3 broke off since 97. it has been in saltwater. do you have a video on removing power head

[@haddenstallings6554]

I have the same motor with ignition start and I believe I hooked battery up backwards.. something smoked.. and now when I turn the key, the motor try’s to start but I’m not getting a spark when I hooked timing light up.. HELP.. what did I screw up

[@vanessagordon5333]

Awesome informative vids mate cheers, who do you go through to buy your parts ? I need to replace thermostat and water pump on my 1998 50hp evinrude 2 stroke motor .

[@DangarMarine]

I get all my parts from MarineEngine.com, the channel sponsor.

[@11bayrat]

Hey good video thanks.did you put grease or anything on the boults ?? I used grease and don't know if that was good or bad to do?I also had broken snap off ones that I had to replace.salt water use only motors around here!

[@DangarMarine]

Hey Bruce. I prefer an anti seize like this stuff www.permatex.com/products/lubricants/specialty-lubricants-anti-seize/permatex-anti-seize-lubricant-2/ but grease can work well too. I'm not sure how well grease interacts with the head of the cylinder head though.

[@ronpowell2373]

Bruce you need to take a few NM off the torque if you lubricate the threads if the manual says to fit them dry. Personally I use low strength Loctite (blue) on the threads for corrosion control.

[@11bayrat]

Thanks for the help this has been a great help from all of you

[@stevendeakles6956]

I have a 1987 evinrude that I purchased recently, I’m trying to get the fuel/vents lines figured out this motor has a small vent hose going to the motor behind the fuel pump, I got everything hooked up the the carb and the primer and the one behind the fuel pump has nowhere to go

[@obxarms7685]

any chance you might know where these are on a 73 85hp Evinrude?

[@mydogs7508]

Hi great video. Is this the same process with the 40 hp out board?

[@DangarMarine]

I believe so

[@mrsuarez430]

Thanks man buddy i had an issue with an 81 25 rude that got hot wasnt an impeller issue as its all new but top half of the engine overheats so i removed the shitty broken thermostat (left the cap and seal ) and now doesnt start doesnt seem to have a sensor so im kind of stuck... HELP 😱 was starting easily

[@dsr20631]

Hey Stu. I was wondering is it advisable to coat the bolts in a thin oil before replacing them to help with any corrosion issues later on? I always apply grease to other bolts on my motor that don't require torquing but would a thin oil alter the torque do you think?

[@DangarMarine]

Some sort of anti seize would have been good. Oil is often specified when torquring bolts, on the shaft and under the head of the bolt so that the torque setting is measuring the stretch of the bolt rather than the friction in the threads. I doubt grease would greatly affect a non-critical torque setting such as this though.

[@dsr20631]

no worries, thanks for clarifying that.

[@fishyhobby3697]

Would anyone recommend any anti-seize type on the screws when putting them back in, even if replacing with new?

[@DangarMarine]

A little bit of marine grease can help.

[@andrewsbbq]

does it make sense at all the the t-stat and channel ways in my 1984 Evinrude 15 are covered in exhaust soot?

[@DangarMarine]

Although the exhaust does go out with the cooling water you shouldn't get soot up to the thermostat, no.

[@christophercarter3685]

long time fan just a question are you not worried about getting brake clean and sanding dust inside the cylinders

[@DangarMarine]

No, they can be cleaned out. If you are worried just poke a rag inside first.

[@stankfaust814]

Great videos. I have a new to me 30hp Evinrude from 1987 that is in great shape, just no tell tale. Can you do a series on trouble shooting the coolant flow circuit when it is not a blocked tell tale hose or a bad impeller (I've done both of those already) pulled the tell tale off at the exhaust manifold and no water. Motor runs great so I don't want to scrap it, just not sure on next steps. Maybe the exhaust manifold off?? thanks again

[@DangarMarine]

This playlist has all the cooling water videos kzbin.info/www/bejne/bqjCoGiud52NfKs

[@hectorrodriguez-ye9lm]

Thank you

[@siunguyen4211]

Is never seize a bad idea because I always use it on all bolts everywhere

[@johngeisiii8090]

Do you have to worry about pitting on the walls and seat where the thermostat washer rests? I have the same exact engine I inherited from my father in law.

[@Shokenryu]

Can anybody tell me why I cannot find a complete thermostat for my 1993 Johnson Outboards 9.9 [ J10RETM ]? All I've found was thermostat parts, bit by bit.

[@nickmerrick8255]

Hi Stu, is it worth using a penetrating/release agent on corroded bolts, or is it a waste of time and money?

[@DangarMarine]

It can help. I've been told that wax is good too as it will tend to track along the threads rather than just evaporating when used in conjunction with heat.

[@mattfrapple7911]

Hey nick, I have had plenty of little M6 bolts that were so badly bound, I left them overnight with molytec "Liquid spanner" soaking, and bugger me, easily cracked next day... so some situations- definitely.

[@ymmiti1541]

Hi Stu thanks for all the great videos. I have an 1992 70 hp Evinrude two stroke. I recently changed the water pump and thermostat. The motor ran great the first day and half way thru the second day the horn alarm sounded constantly, even when I turned it off and keyed it up to start again. If you could offer some advice to remedy this problem it would be great. thanks very much Bill K. from queens NY

[@DangarMarine]

If it kept going even after it had cooled down I would use an infrared thermometer to check it is actually overheating and test the temperature sensor.

[@ymmiti1541]

Thank you very much Stu. I appreciate that your so generous and precise with your knowledge. Bill K.