1978 mercury 800 80 hp outboard motor repair.....

[@Drake4176]

Thank you so much, I have basically the exact same thing with zero experience. Mine has a few of the same problems, replaced fuel lines, new plugs, stator wires rotting away, but seeing how you've repaired the wiring I think i might try that instead of buying a new stator

[@siosaiasilatolu6680]

Thanks mate for your video. I see not much people have the same as mine only you

[@jessewilson8676]

I wish you would have shown how to remove the trigger…removed stater and flywheel no problem. Having a hard time getting to the trigger off….same problem with bad wires. Edit I only removed part of flywheel 5:14 removed center bolts will put them back on and pull it properly.. I should be able to do it now. Thanks for the videos

[@ryanprince635]

What is the circle with the screw in it called mine is leaking

[@pando3beats]

I just got the same motor yesterday an looking to do the same guy said it turns over but I know nothing about boat motors how do I turn it over with out a boat I have battery ... the wiring harness is also a lil messed up just looking for advise on first steps ty Amazibg video btw

[@nightmaregizmo]

Hi yes you make a make shift horse out of wood then one. drop lower part of motor in like half barrel full of water or two get muffs you can see them in this video kzbin.info/www/bejne/hHTVgpWHfsiVgNk also with out being there you may need to get a book to help with wires

[@nickdukes9171]

Hey I have question I have 85 hp mercury thunderbolt and the wiring on it was bad so I'm using my old wire harness from a 105 chrysler and I have a blue,purple and green wire on my chrysler harness and a brown wire on my mercury I'm not sure where it goes and why I have 3 extra wires?

[@rickybrock9313]

I have the same motor replaced all wiring harness trigger stator 2 coil packs plugs still has a miss in it can't figure it out

[@jordanrose1194]

Once u removed the flywheel and the stator how do u remove the trigger? There is a large deal that went around the middle nut locking it in it has inside threads

[@doublehelix109]

watching this in 2021, great video thanks!

[@kylelc17]

Bought a 78 vanguard boat with a 79 merc 80hp power trim. The guy said it ran then died when they were on the lake. He also said it might be the stator any ideas what it could be? Stator looks new, plugs are new.

[@RileyPlaceMusic]

for anyone trying to figure out the year of your motor, find the serial number on it, then go to oldmercs.com - they have a model year guide - that's how i discovered mine.

[@lebanonbeirut7830]

Hi , love the video very detailed but can you please show me where the fuel filter is??

[@nightmaregizmo]

in the bottom of fuel tank outlet hose very small screen if we have same tank hope this helps

[@gilfredooquendo9969]

What spark plug cables should I get there are so many

[@nelsonvaldez4097]

How hard was it to install the trigger on it and do you have a video out there 🤔

[@phillyons1352]

Help please I have this motor and need help repair-aligning my flywheel on the stator.

[@kevindierickx4795]

How do you change a starter on that one

[@deankoerner2436]

Thanks I have one of these ,great help

[@gatorred157]

i have had 80 and 85 my 80 had a distributor & 85 has a trigger device like your 80 you have a good video about it! i got a 85 with trigger I just got it 3 days ago i never though i would find one! i was looking for a Johnson or Evin-rude older 2stroke motor for wiring and controls of my boat! i found 85 instead all wiring and cabling with control box too!

[@nightmaregizmo]

that's great ya some parts are hard to find don't rule out ebay but! if you do get a part from there make sure you research your part # well good luck and thanks for chat have a great day

[@gatorred157]

@@nightmaregizmo i got mercury deals in area 2 of them & Napa has some parts like water pump parts, the mag parts & trigger stuff, i did not understand it now i do! i had one (85 it dropped fire in cylinders when it got hot or warm )years ago I traded it for a repair of a older 80 hp Mercury with distributor, i got my moneys worth! tony the mechanic said leave the 85 put the 80 on your boat with wiring that came with it! & bring it here I fix it in a week plus your 50 merk boat too! he said i do both i had 50 at his shop, it fired up quit started it it run backward, tony said leave it! 3 days later i showed up 2 motors 80 and 85 in back of my truck tony I got bigger problem help! i got now a ranger bass boat with 150 hp xp Johnson/evinrude OMC wired boat I found one motor that older family that was a 60 hp with wiring( 3000 dollar plus repower job) the local Evin-rude dealer is a jerk my boat was full of water & boat shot and motor junk, he said & that was not true, the 60 needed a 20 dollar safety switch to make it run on my boat,ps i wrote BRP marine a nasty gram with what do i do with your test computer on this evinrude motor that was a test unit paid for by old owners of Evin-rude?? it was a pro fisherman's boat my relation? before I found this Mercury 85 as my backup repair motor! back when i got the boat i told them i rather have a merk then that piece of gas drinking crap! 3 2barrels and high test gas it was fun well it ran! the way it end was upsetting I had stroke,blood clots & pain and it all turned around with one piece of info we got test from his blood we have new med try it! it worked! they found the root of the illness!

[@jddeefo1022]

Hey Gizmo, I was given an 800 80hp merc outboard. I like you know nothing about it. It has sat for 20yrs but am interested in tinkerin with it. Did you get yours going, are parts available? Where did you find the serial number on yours. If anyone can give some advice it would be appreciated.

[@dalecordova]

hey buddy where is the thermostat on that motor i am working on a 50 hp and cant find the thermostat

[@seancainey3979]

Any chance you can help a brother out? I have a 78 75 hp mercury. The wires are all dry rotted

[@richardjohnson4084]

I have an 80 HP merc that starts but dies when you put it in gear. Any suggestions?

[@mohanlalsingh4198]

Sir please let me know what happens to my mercury 1978 /70 hp out board motor runs for 15 minutes and shuts down and it won't start have to wait for Some time and will start again. I like you video explaining how to troubleshoot

[@nightmaregizmo]

so sorry sold the boat... but in your case could be in fuel system things to check old fuel bubble - cracked , fuel lines old - cracked look at carb bowls see if leaking also fuel line can collapse - hose weak / old hope this helps

[@stevendoporto9261]

I have the same motor I'm trying to order a new trigger but the one online doesn't look like ours the 1980s does is that the trigger you order

[@gannakushch9181]

Thank you finally a video that helped me, in fact the only one that help thank you

[@nightmaregizmo]

no problem anytime

[@jamajose]

Where you bought parts like carburator kit.

[@nightmaregizmo]

for me this long time ago but if i recall ebay

[@randybennett1232]

I am having problem getting some help I have 1986-150hp mercury it has a rectifier and a seperate voltage regulator I need to get wiring diagram on how to Hook up voltage regulator

[@thesenutz77]

Every old mercury I have seen has wiring issues. The wire they used was garbage. My advice for anyone is avoid old Mercury outboards just because of this.

[@justinwoodard225]

How did you take the flywheel off? Did you use a puller or take it off some other way?

[@nightmaregizmo]

hey how you doing try this www.ebay.com/i/293629570009?chn=ps&norover=1&mkevt=1&mkrid=711-213727-13078-0&mkcid=2&itemid=293629570009&targetid=4581046486499600&device=c&mktype=&googleloc=&poi=&campaignid=403204735&mkgroupid=1239149819509181&rlsatarget=pla-4581046486499600&abcId=9300379&merchantid=51291&msclkid=d41388a26ee4159b6202d7e7d97949b5 or Outboard 1/2"-16 Flywheel Puller 91-849154T1 For Mercury Mariner Force Yamaha there a few places that have it you can look for best price hop this helps

[@justinbailey337]

Do you still have this? I have some questions. I just replaced all the wiring and am scratching my head on 1 thing

[@nightmaregizmo]

sorry sold it 3 years ago but ask away if i cant im sure some one here can chime in to help...

[@ianworner3342]

how did you go mate, all up and running

[@1chance4life76]

hello, great video!, im in the process of trouble shooting my 80hp merc and im having trouble trying to figure out what year it is so i can find the proper parts.It looks just like the one in your video. Any advice would be great thanks!

[@nightmaregizmo]

i will get back to ya lol no one every asked that but a great ?

[@1chance4life76]

nightmaregizmo thanks i think i figured it out, the SN has to be within a range of numbers that the part numbers go by still not sure whats wrong im planning on testing my stator and trigger wires this weekend, also orderd a rectifier since it was cheap

[@nightmaregizmo]

good luck check other videos to see if they help catch ya later and good luck....

[@sicklecell9999]

I know this is way too late, but for anyone else out there with this same question, you don't need the year to order parts...just use the engine serial number... it's found on the motor mount / pivot area, a large metal plate is there with it.

[@1chance4life76]

@@sicklecell9999 yeah this was a while ago lol..but seems like i did need it for finding a part number. I ended up getting it anyways and it worked.

[@giloquendo]

Please help. I have the same motor it start then dies fast

[@trd2009]

Hey I have one of these(a 79') and know nothing about it. What's the displacement? Where can I find more info and specs?

[@nightmaregizmo]

try here www.boats.net/parts/search/Merc/Mercury/1979/parts.html , or , forums.iboats.com/ , . 80 hp Mercury It has 4 cylinders. The pistons have a 66.6 displacement. The bore width is 2.88" and the stroke length is 2.56". but please dont take my word this what i found when you go to other sites they want to know your serial number so there 2 spots you can try good luck

[@benloudermilk]

Where did you get the parts? I have the same motor but I can't find any parts at my local boat mechanics. Thanks for the help.

[@nightmaregizmo]

now there is a great ? i got mine off eBay or try oreilly's

[@1chance4life76]

Any way you could help me with part numbers i know my sn # and it made in Canada. Im not sure what year it was made though?

[@jackmccabe2146]

Should there be smoke coming out from where the prop is

[@toddreuter9152]

I have the same motor....I have an intermittent issue...it will not shut off using the key.....occasionally we have to shut the fuel off to shut it down....I want to wire in a kill switch....can you explain how to do this? Thanks!

[@nightmaregizmo]

so sorry for getting back to you so..... late but had same problem about same time you asked ? i found in mine was there was a short in the control box the wires and rubber insulation had fallen apart and was make a short check there see if that helps and again so sorry for the late getting back to ya thanks from Rich & Peggy

[@nightmaregizmo]

hiya yes its all up and running click my channel and see new updates

[@EpsteinsRope]

Do you know if a 1981 merc 850 distributor will work on a 1973 merc 850? They look identical.

[@nightmaregizmo]

hiya you know im just not sure but i can find out its late here know i now have a few boat guys i can ask ill get back to you soon as i can

[@EpsteinsRope]

That would be awesome and I'd greatly appreciate it. I just bought a 1972 Ranger TR3, it came with that engine. The guy I bought it from said it needed a new distributor and to be timed. I can't find any info on the boat or the distributor situation.

[@teenageflames]

Hi..i have a 70hp merc 1978..wont start..does nothing when i turn the key on.Battery is new,solenoid is new and starter works fine.I even tried to start it off the solenoid,but doesnt even spark.Now if the rectifier is bad,would that prevent the engine from turning over?

[@nightmaregizmo]

hiya larry you said " 1978..wont start..does nothing when i turn the key on." lets go with it wont crank then deal with running part ok on a no crank problem we need to know if you have power going to solenoid its the small wire on the side most are red but im not there....... so lets go with small wire on side.. have some one turn the key as to crank / start motor then you can use a test light or a meter ... you should have around 11.5 volts or more / test light is bright now lets say the meter / test light does nothing then you need to test that wire from ign switch to soleniod there may be a fuse in between ..... or bad switch? so really need to have power from ign switch to solenoid when cranking / starting now for the no running its possible the ign switch is bad this why it wont crank / start and or supply power to other components or you have some blown / bad fuses or bad ign switch i would start there before going into any other motor electronic parts with waste money on that for a bad switch i hope this helps

[@teenageflames]

Thanks nightmaregizmo.but after checking all wiring and found a bad ground off the battery.So problem fixed and she purr's like a kitten.

[@teenageflames]

Oh love your video's.they are really informative.

[@nightmaregizmo]

sweet good deal have fun

[@nightmaregizmo]

thanks i have more coming i been in and of hosp but i think we back on track now and soon ill be back at it.. thanks for the comment and glad was able to help have a great day...

[@arronhannah3710]

Great Video! I have the same motor with the same issue. I was wondering if you had any issues pulling the fly wheel or the best way to make sure I don’t mess up the timing when reinstalling the flywheel or any other issues you may have had disassembling. Thanks!

[@nightmaregizmo]

for the stalling problem when putting into gear this was one of the problems I had you mit want to check this first up on your controls where the ign key is that box I also found bare wires in there that was making a short when putting in to forward gear make it stall by shorting coils so! before doing anything elsa check that as for flywheel they do make a tool for that so not to damage anything hope this helps

[@luduwicaramirez6543]

Where did you buy the parts?

[@nightmaregizmo]

in some cases bought off ebay but! before you do make sure of your part numbers,,, in some case the person you buy from may not take returns back so thats the down side

[@gilfredooquendo9969]

Where are you I need your expertise

[@nightmaregizmo]

sorry ... i have been hurt and not able to get any videos out but i am on the mend and we going to get new series on a 72 chevy truck see you all soon for 2023

[@victorstrickland6629]

I have a Mercury 50 hp 500. I can not find the serial number or the year. Any suggestions. I don't see a tag on it anywhere. Please and thank you for any help!

[@nightmaregizmo]

should be around there, on a metal plate attached to the steering unit just in front of the motor. You might have to clean or remove any paint over spray or some grime out of the way before you can see it . It loves to hide there, . Hope this helps.

[@JTJG1994]

ever get it going?

[@nightmaregizmo]

yes up and running then sold it and before I sold it I told the guy to make sure to watch my videos before buying so this way they cant say well you never told me so the next day came down and bought it that was about 1 1/2 years ago and we still talk here there and helped him with other stuff as well.... the over all problem came down to the throttle box there was bare wire in there and every time you go forward almost stall after that repair was all good and hes been happy hope this helps

[@alburke6132]

you talk about dva tests on different components of this motor, what is a dva test

[@stevehinson6714]

anybody out there know anything about 84 mercury 800 800 got fire got fuel but no start

[@captainalucard4212]

Need help

[@vtwinaddicted5852]

super common problem with old mercs

[@nightmaregizmo]

ya for sure been a pain lol