Mercury 4 hp outboard 1974 will it run again epic journey of success made in the USA a man and motor

[@williamcrandall1447]

I bought a boat and it has the same outboard on it. You Sir just answered all my questions about this motor. I can’t thank you enough for the class. 50:1 helps my a lot. Great tutorial

[@charlessc3150]

Just got mine running today she runs great thanks again for the video it helped me out going to put the boat on the lake on Monday

[@Michaelsbackyardmarina]

Glad I could help

[@Jimmyzb36]

I got one myself. Thanks for the video! Just one of my retirement project stash.

[@Highspeedoffset1]

Nice job, It's great to see those things brought back from the dead!

[@ronjohn7878]

Michael, you remind me of a friend of mine. Great video. I learned a lot from you. I have a 1980 7.5 Merc. Many similar parts. Going to bring it back from the dead. Thanks for doing the video.

[@Michaelsbackyardmarina]

Awesome, good luck with your project, thanks for watching and commenting

[@trail70brent]

I have the same identical boat motor in my opinion it’s the most beautiful and best sounding small outboard motor ever made

[@Michaelsbackyardmarina]

They do work well. Did you see the video with it on the water?

[@trail70brent]

I just watch the video of the Mercury 4 horse out on the water great video great little outboard and chainsaw cutting into your fun LOL and I am now a new subscriber to your channel keep up the great videos thank you

[@Thewrightstuff777]

That is such a cool little motor!!!

[@ZachsGarage1]

I couldn't agree more! makes me want to go get alittle outboard!

[@malcolmrollason]

Just got the same engine. Thanks for the tips mine hasn't been tested but this gave me a great insight. Thank you

[@ct1762]

good thing you didnt have to chase any wiring/ignition issues. you got off easy! cheers.

[@Michaelsbackyardmarina]

Wiring on mercuries are an expensive mess for sure. Thanks for watching.

[@BENFrankaka-sandstorm]

Just picked up a 1968 merc 6hp. Guy I bought it from said it runs a bit when he stayed fuel into the carb. So I figured it a fuel issue. Cleaned the carb it's was pretty dirty. I also hooked up a compression tester. Got 60psi on both cylinders. But she runs good after the carb clean. Good spark 60psi compression.and I guess now I also got fuel.

[@mayrienkoira]

Love yourvideos. Greetings from Finland !

[@patrickkronenwett1610]

Do you have a list of the part numbers that you purchased to swap out spent parts?

[@anthonylatronica5108]

Mike FYI ihavalwzys been told to not run the engine at higher throttle settings in the test tank. Another great video. Thank you

[@Michaelsbackyardmarina]

Thanks for the info!

[@stevanrose7439]

Love those old merc motors. I have a 4.5. That runs pretty good for as old as it is.

[@Michaelsbackyardmarina]

Those little singles are smooth

[@richardspengler1794]

Love that little Merc! I've got a 73, 9.8hp that I need to get her running again!

[@RobsGameplays]

at least you can find spare parts for these.. in my country i have no chance of getting any of them so I have to make my own gaskets, plastic housings, grinding any other screws till they fit in..

[@Michaelsbackyardmarina]

Pretty lucky here to have parts available.

[@Grumpyneanderthal]

I just traded for a 1971 Mod 40 like that. Thanks for laying out the process. Hopefully the stator is good I’ve heard they can be expensive. Great video

[@Kana0211]

Cowling looks like the jets of the early days. Classy

[@thebreamologist4906]

Those old mercury is worth their weight in gold , we use them as striper fish attractors . Anchor off and let that little motor idle stripers are sure to come

[@bobbyandras6630]

Now she sounds better. I get alot out your videos bro .I found the website of one of your viewers. I have a 70s model also but it's a 20 very powerful little motor

[@Michaelsbackyardmarina]

That's awesome

[@oscarfergy]

I have the same motor where are you finding parts?

[@spatenpauli8069]

Good job!👍

[@antonypereira3853]

Thank you so much master, I am about to fix one of this but the bottom fuel pipe is broken and dont know where to get one.

[@Michaelsbackyardmarina]

possibly oldmercs.com

[@garrisonh]

nice! good job. I really like the look of those motors. It runs great

[@Michaelsbackyardmarina]

Cool, thanks

[@75mandel]

do you have clerans to ponterbreks? is it 0.30mm ore bigger ore smaler ... and carburator air bolt it is 1 lap out?

[@freddy2064]

Thank you for helping us maintain our vintage motors. I have a 1967 mercury that runs great but hard to start. I noticed that I prime the motor and fuel is being back washed into the pulse line, is this normal or can I have a bad check valve in the pump? Thank you again for any advice you can offer. Subscribed!!!

[@ds7193]

I can tell this is pure fun for you. And I'm glad I found you.I will probably watch every video you have. But there is something I need to say, so I will. The People that watch and follow you are one, boat owners that would love to learn how to save money buy learning how to do something on there own. Or two , mechanics like my self, I'm a Stihl wrench of 20 years who has bought a boat, and realized this is a lot different than a chainsaw.I watched your 4 hp merc video tonight.loved it, EXCEPT when you decided to fast forward thru the carb rebuild and the fuel pump rebuild, to get to the engine start. That engine start is going to thrill you more than it will ever thrill us. We want to know how to get our own personal engine start thrill. I have watched about five videos, you always start at the bottom. end , you show even on different engines the water pump, the seals and the empellar. So Im feeling like this is somthing i can do, im learning. Repatention is how we learn.you have new viewers every day. thats it.

[@Michaelsbackyardmarina]

Yes I should have shown the carb rebuild. I did on the 6hp merc I did recently. they are pretty much identical. kzbin.info/www/bejne/mV62dKBpjsd3idU follow this link and you can see it

[@DeanO]

The journey was fun to watch

[@cerescop]

Good video, all isssues I had have been addressed and the aspect of the right side of the engine showing the tell of the water pass thru was the last issue I had as the left side did not show the tell. Good job, enjoy the "new" engine.

[@Michaelsbackyardmarina]

the old 4hp doesn't have the traditional pee hole. it just blubbers out the back hole above the waterline

[@charlessc3150]

Great video just got a boat today with the same engine first time owning a boat fired up the engine and had to keep starting it so next move is to do the fuel pump and clean the fuel system up and do the water pump as well because I wasn't getting water to come out like yours great video sir and do you have part numbers by chance thanks again

[@jakeheon4597]

Could you make a video on how to remove the choke to get the carb out I have the same motor and can’t seem to figure it out

[@anthonylatronica5108]

Mike the center button on the throttle grip is the kill switch

[@Michaelsbackyardmarina]

Yes it is.

[@BeefSupreme-vk9sz]

​@@Michaelsbackyardmarinanot on mine it's hard rubber twist lock, maybe the thing is hardened, I always just dethrottle till it dies

[@terrymck9332]

Awesome. I wish I could do that. I thought FOR SURE you were going to take it out on the water for us! That would have been a great ending. They make parts for a 74 mercury? That’s pretty awesome.

[@LifewithJames]

Do you have any sources for wiring diagrams? The positive and negative,coming from my coil were rotted and fell apart.

[@Michaelsbackyardmarina]

I just do a google search for the wiring diagrams.

[@garyslate2789]

Hi I'm having a issue trying to figure how to adjust the tilt on my 1973 Mercury 6hp please help if possible. TIA

[@Michaelsbackyardmarina]

there should be a trim pin and trim holes on the mount.

[@ianward1126]

Great video thanks for the information, I have a 4.5hp 2 stroke that has the exact same carby and fuel pump but I can’t get the kits here in Australia and coming from the USA the freight is the killer. Could you help me with the quicksilver part numbers please for both the carby and the fuel pump. Thanks again

[@bakergang89]

Do you know where I could possibly find a lower unit for a 1969 model of basically this same engine you have in this video

[@Michaelsbackyardmarina]

Just keep you open on eBay and market place

[@marklivak3896]

Hello I just picked up same motor. Where did you order parts from? Thanks Mark

[@ajmarine8076]

How to get the impller to fit inside metal cup.. I ordered a kit. Could not get impeller to fit into cup?

[@Michaelsbackyardmarina]

It has to be the right one first, and it is a little bit of a pain on Mercury's. Johnson and Evinrude have a better design that makes it much easier. Thanks for watching

[@johnmcgibbonii2272]

Hey brother love the video. Im having an issue with the same motor. On the top cover of the carb there is a little hole and gas is leaking out. It looks like there is supposed to be a cap or a small ball bearing pressed in? Just curious if you knew anything about it.

[@Michaelsbackyardmarina]

If gas is coming out of the carb anywhere, then something is not right.

[@g0ated__c1ps99]

mine does not turn off when i choke it what should i do

[@mtnbkr265]

Awesome video! Can you tell me where to get parts for this motor? I am looking at one for sale but wanted to see if parts are still available in case it needs work

[@Michaelsbackyardmarina]

oldmercs.com

[@jamessylverne6843]

I have a 1972 Merc 40 that looks just like this 1974. I'm pretty new to your videos and am wondering where you purchase your parts? Any way you can enlighten me? Thank you.

[@Michaelsbackyardmarina]

marineengine.com or crowleymarine.com

[@johnb5519]

I have my Grandads 4.5 hp, it's the exact same as that. Maybe up here in Canada they called it a 4.5 for marketing reasons.

[@Michaelsbackyardmarina]

sweet old motors

[@sicklecell9999]

THANK YOU. have the 4.5 engine and will need those water pump parts... can you say where you found 'em?

[@Michaelsbackyardmarina]

oldmercs.com

[@LivetofishOutboardRepair]

I just bought a 1967 3.9 hp Mercury with exactly the same running issues. I cleaned and rebuilt the fuel pump but the pump keeps leaking fuel out the sides between the mounting screws. Did you use any kind of sealer on the gasket or diaphragm. I just can’t seem to get it to stop leaking fuel. Any suggestions would be appreciated.

[@edwardhuber7864]

great video nice shirt.

[@Michaelsbackyardmarina]

Thanks!

[@HorstDonner]

I have same motor from 1973. When doing a run test in a full rain barrel, I open throttle in neutral, and the exhaust is very grey and smokes a lot. When I adjust the low idle speed using the slotted screw above the carb intake, i got it to idle better and not smoke as much at low throttle. Gas:oil is 50:1 mix, using recommended 2 stroke outboard motor oil. Does one need to adjust the high and low timing screws on the cam which the throttle slides along? or does one just live with it burning lots of oil?

[@Michaelsbackyardmarina]

two strokes will smoke a bit, I like the Amsoil outboard mix, it smokes quite a bit less and it will foul your plugs less too. thanks for watching

[@HorstDonner]

@@Michaelsbackyardmarina thanks for the tip. I tried it with fresh fuel and it was as smokey as the regular 2 stroke oil I used before. I guess there might be a problem with the piston rings or something else which results in poor combustion.

[@HorstDonner]

It runs smokey like the one in these 2 videos kzbin.info/www/bejne/b2SbgHWwg7eSrKc and kzbin.info/www/bejne/baWpl2dqp7-prqs . Any clues as to what could cause such smokey exhaust and how to minimize it?

[@michaelmacias2817]

What kind of oil dose it take or dose it just use gear oil if so what kind ? Thank you

[@Michaelsbackyardmarina]

gear oil in the gear box and Amsoil two stroke in the gas

[@ilikesheeps610]

can u link the adapter at the gas and does it fit on the original one? sorry if bad english

[@BeefSupreme-vk9sz]

Pump to carb hose leaks at fittings often, pump goes bad too

[@Michaelsbackyardmarina]

for sure, thanks for watching

[@charlessc3150]

I have a question on this engine does it it take gear oil on the lower half by chance first time owning a boat thanks

[@Michaelsbackyardmarina]

Yes it does

[@charlessc3150]

Ok perfect on this engine where should I put it in at and to drain the old thanks

[@alexdesslin]

cool !!

[@Michaelsbackyardmarina]

thank

[@rickydowdenrd]

Could you send a Mr a list of what parts you got and where you gottem ? Thank you .

[@Michaelsbackyardmarina]

www.oldmercs.com is the place to shop for old mercury stuff.

[@genebrown7161]

Wonderful videos. What is the weight difference between the model 40 and 60 mercury?

[@Michaelsbackyardmarina]

I haven't checked that out but I would guess less than 20 lbs

[@danielsvensson356]

Hi got the same engine but mine has a 2 blade prop what propeller pitch and size is it on your 3 blade prop?How many splines on the propelleraxle on our enginge?Im concidering replaceing to a 3 blade prop.Very good video and nice working music.

[@Michaelsbackyardmarina]

I don't have the outboard anymore and I don't remember what size prop was on it

[@danielsvensson356]

@@MichaelsbackyardmarinaI Understand. Thanks anyway.

[@domvu5312]

Hi John Just wondering where you ordered the fuel kit from? I have the same problem with my 4hp mercury. Thanks Dom

[@Michaelsbackyardmarina]

oldmerc.com

[@rnendzame]

Ty

[@Michaelsbackyardmarina]

you are welcome. thanks for watching

[@danparker1925]

I just picked up this exact same motor. I’m new to this. Can you tell me what type of fuel line plugs into this. The ones online appear to have a guide pin with the fuel line. This one is in a round hole that the fuel port is in The single male port had a spring loaded tip. There is a single pin at the back of the fuel port that that is on both sides of the port thank you.

[@Michaelsbackyardmarina]

Check out oldmercs.com to see if they show you the type on this 4hp outboard.

[@AimaginationHub]

Hey good sir, love the video and your enthusiasm for work. Just wondering what the part numbers were for the parts on the fuel pump or a link to the kit you bought. Facing the exact same issue and this is my first outboard, same exact 3.9 '74. Thank you.

[@Michaelsbackyardmarina]

Go to oldmercs.com, It will show you what carb kits are available.

[@outlawflyer7868]

So I acquired a Volvo penta 39. I don't know what it's called, but it has a bunch of blades on top of the motor. I need to remove this but I don't know if I should use a pulley puller from an auto parts store or a special tool is needed to remove this. Do you know where I can get the tool needed to remove this part or would it be safe to use an automotive pulley puller?

[@augustoduminuco4683]

I have1964 9.8 hp, I wish you were close my place.

[@Michaelsbackyardmarina]

All I can say is go to oldmercs.com for parts and thanks for watching

[@RichieRouge206]

I had a 4.5hp Gnat but couldn’t find a new coil pack here in the UK. I sold it for spares. Great engine and video

[@austinlittle924]

I just started working on the exact same engine, could you perhaps share any tips on removing the carburetor? Just looking at it and it seems to be very very tight on space

[@Michaelsbackyardmarina]

remove the fuel pump and the chock knob first. This will gain you access to the carb.

[@bennymays8020]

I was just given a 1981 I think, has been started in 10 years, so far I have cleaned the inside of fuel tank and new plugs, plan to get new fuel lines, install new impeller then see what happens, would appreciate any suggestions

[@Michaelsbackyardmarina]

Caburator may need cleaned, but try running it on a two stroke mixture with some seafoam.

[@bennymays8020]

That’s what I thought but dealer said Mercury product was much better

[@michaelmacias2817]

I have same motor I’m gonna try to redo some stuff on it but don’t know where to get parts or pat numbers . Where did you order your parts from ? What are part number for the impeller - fuel pump kit ? And carb gasket kit ? That you ordered . Thank you loved your videos

[@Michaelsbackyardmarina]

go to oldmercs.com and you can find all your parts there or some may be found on marineengine.com

[@johnnyringo3261]

Where did you get the replacement shift lever?

[@Michaelsbackyardmarina]

marineengine.com

[@ronaldarchie7276]

I am considering buying one just like this I can do the work on it where did you get the parts

[@Michaelsbackyardmarina]

oldmercs.com

[@jamiebarton5640]

Great video! I just bought what I belive is a 73. Looks identical. Can you link where you found the parts? I'm having trouble finding them.

[@Michaelsbackyardmarina]

Marineengine.com or oldmercs.com

[@davidoshaughnessy1709]

Did you ever have a problem with the gears in this motor ? I have this exact outboard and I cannot get reverse ? Reverse gear is neutral and neutral/forward gear is just forward ?. The gear shaft and gear leaver is lined up in forward position when the lower unit goes back on but it seems when I put the gear lever into reverse it skips a gear and everything gets messed up again. Any information is hugely appreciated. Thanks

[@Michaelsbackyardmarina]

If the shift shaft has been accidentally pulled and put back in the gear box is probably out of sync.

[@davidoshaughnessy1709]

@@Michaelsbackyardmarina would you recommend taking off the prop to investigate the gear box ?

[@The_Project_Shed]

Its not all about hearing it running. I watched this hoping to see how you removed and rebuilt the carb as i need to do mine and i cant get the carb off the engine. Cant find a video anywhere if how its removed

[@Michaelsbackyardmarina]

I have some mercury carburetor videos coming in the future. I have about 10 mercs in the cue right now.

[@austinlittle924]

Same! I got mine out, but I'm dreading when I go to put it back in. Very tight on space.

[@scottsmith2869]

Love the videos! Could you do a video on where you source your parts? Thanks

[@Michaelsbackyardmarina]

Most parts I order from Marineengine.com and Amazon

[@peterjanov6765]

Hi. Where is good place to order parts for this type of engine? Thank you

[@Michaelsbackyardmarina]

oldmercs.com

[@zfontes]

Hey loved your video it helped me a lot! If you could link me the fuel pump diaphragm kit you got I’d be super appreciative because I can’t find it anywhere! I have the same little motor I’m fixing up. Thank you so much

[@Michaelsbackyardmarina]

marineengine.com

[@zfontes]

In case anyone’s wondering, the part number for the fuel pump diaphragm gaskets is 21-30430A2

[@mgollinger1]

How did you get the shift shaft seal out?

[@Michaelsbackyardmarina]

back off the square head bolt and remove the aluminum assembly.

[@richkathy8491]

I have a Mercury 3.9 Not sure of the year. Haven't used it in years. Last time we used it, it got a new starter rope and now the grease and everything is sticky so the rope won't recoil. Was hoping to see you tear the recoil apart. Have you rebuilt a recoil like that?

[@Michaelsbackyardmarina]

got one coming up I will be tearing into very soon

[@richkathy8491]

@@Michaelsbackyardmarina LOOKING FORWARD TO IT!

[@daverobinson9351]

I need to bring you my motors to get running like a top :)

[@Michaelsbackyardmarina]

I wish you could BUT I don't work on outboards for others. I just buy none running outboards and make them run again and then sell them. Thank you for watching.

[@nelsoneslava4491]

Hola, vivo en Argentina y tengo un motor igual, me podes ayudar con una consulta. Gracias.

[@RideorDieDietoRide]

Nice job ! I have my childhood motor, a 45 , where did you find the parts for yours ?

[@Michaelsbackyardmarina]

oldmercs.com

[@ZachsGarage1]

greadt video! I laughed at 43:50 :P

[@enoswebster6902]

ok is that small amount of water that is or looks like is coming out the exhaust is that ok? you can see it on the handle side plus you have good water out the piss hole got to love the older mery

[@bleezham]

Hey Michael, have a dumb Q for you .. I have an old 4 hp from a garage sale for $25 bucks that I want to convert to electric. My plan was to remove the motor and fabricate a mounting bracket for my brushless motor... Any suggestions on removing the motor itself? I removed 6 bolts and thought this was it but not sure... 1st timer here but not afraid :-)

[@coolbreeze1954]

Put in New water pump in 1987 30hp Evinrude but it doesn't pump water! What should I check?

[@Michaelsbackyardmarina]

You need to blow air through all the passages. If air don't go then water don't go. did you get the water tube lined up on the pump?

[@coolbreeze1954]

@@Michaelsbackyardmarina I blew both air and water from pee tube all the way to water pump. With lower unit off the water pump doesn't pump water when shaft is turned while submerged in water. It's like water is not getting to the water pump.

[@mplemke]

Did you make sure the key was lined up with the notch in the impeller?

[@rickylewingdon9111]

I did not see water coming out is the impeller not working ❓

[@n8th025]

31:30

[@richardmcginnis9532]

Michael im looking for a period correct hood for my little 40 that i paid 25 bucks for . Was wondering if you had a spare or knew some one who might my 40 is a 73

[@Michaelsbackyardmarina]

I may have one. What are you willing to pay. I have a motor I wasn't going to part out but I might.

[@richardmcginnis9532]

@@Michaelsbackyardmarina michael im willing to do 60 bucks for one

[@frankweathersbee2553]

T stat ?

[@64samsky]

Sweet!

[@Cryptony1975]

I have a 75 mercury 4hp. Tried pulling it and won't start. I paid 100.00 for it . I don't know where to start. What state you located. Maybe you can guide me

[@Michaelsbackyardmarina]

I'm in Iowa but I don't make a practice of working on other peoples stuff. Keep watching videos and educating yourself on these old outboards and you can get them running.

[@markelks2925]

Where do you order your parts from? I got one just like it I need a few things for

[@markelks2925]

Found it

[@Michaelsbackyardmarina]

oldmercs.com

[@VS-me7ff]

Water pump? Looks like it about to seize

[@Michaelsbackyardmarina]

Ok, Thanks for the tip

[@anthonybruno8458]

Did you go through the carb? That would get it in top top shape.

[@Michaelsbackyardmarina]

yes

[@bennymays8020]

Forgot to mention Mercury 4hp

[@Michaelsbackyardmarina]

No worries

[@mr.v.2434]

I would like to find the lost documents of my mercury 35 hp can someone help me please?

[@Michaelsbackyardmarina]

Thanks for watching

[@fallensk8er612]

Where did you find the parts? What kind of oil ratio does it run? Synthetic or regular oil?

[@Michaelsbackyardmarina]

marineengine.com. I run 50:1 mix Amsoil synthetic myself

[@daverobinson9351]

I was yelling at the screen, it's not peeing

[@daverobinson9351]

on the port side it was peeing earlier

[@Michaelsbackyardmarina]

oh yes watch that pee.

[@edwardbotham9178]

I’m not seeing any water from the water pump

[@Michaelsbackyardmarina]

On mine or yours?

[@michaelruggia476]

Where e thermostat

[@igotatan1]

Those old engines were made for non- ethanol gas...

[@Michaelsbackyardmarina]

you are correct and that is all I run in all my small engines

[@igotatan1]

@@Michaelsbackyardmarina Do me a favor? Please tell your audience why... Thank you, for what you do.

[@timmeraw2307]

Good instructional video overall BUT.... as you said in the middle... people want to see if it will run after you work on it. To me that means from FIRST pull on. It was clear that you did not show the first pull but after you had it running.... exhaust was coming out of it just before your supposed first start. Just sayin...it spoiled the suspense for sure.

[@Michaelsbackyardmarina]

Not always do the videos go as planned. Thanks for watching.

[@sethgabbard7705]

How much did you pay for it?

[@Michaelsbackyardmarina]

$200 and put about $200 in it.

[@kentyler966]

$200 for a non runner seems high. At least here in Wisconsin. Like your videos on outboard repair. Can I ask where you find the replacement parts?

[@fumanchu1027]

I bought a 1977 merc 4.5 about 2 months ago for 100 $ Canadian in great shape, complete except for a broken prop and fin and hasn't ran in 5 years. Got it running, welded the fin, changed the spark plug, the prop shaft oil seal, gear box oil,water pump impeller, propeller and drain and vent screws with the seal for a total of about 100$. Put it for sale for 375$ this week and sold in less than a day. I bought 2 merc 1970 something 9.8 and a 1980 merc 20, I Believe those will be a different story but worth working on them.