1975 Mercury 20hp gets more attention Plus we tear down a 1979 to see what went wrong.

[@ralphbarker7791]

I have a 1973 Merc 20 hp that I bought ten years ago for $150.00. I enjoy these videos.

[@Michaelsbackyardmarina]

Ralph, thanks for watching and I'm glad you like the Merc videos. Let me know when you get the hat.

[@ralphbarker7791]

I will let you know for sure. Thanks

[@gshock3092]

Good video. I have 2 of these mercury 200 20hp motors. One long and one short shaft. Picked them up at an early estate sale.

[@carolinasonsoutdoors2483]

question, my 79 mercury 20hp is hard to crank i just rebuilt the carb now it will crank, but i have to give it some gas to keep it running. i did notice like you that the idle adjust screw is longer than original. i screwed it in flush, and backed it out 2 turns since that where the one was that i pulled out. i cant seem to get it to idle thinking about putting the original back in. also the float in my manual says to set it at .25 +- 1/64 which is there i believe your other video said something different. the hoses at 11:01 coming out of the side of the crank case the bleed hoses can you tell me exacly what they are for mine were dry rotted and i have ordered new i swear it smelled like gas spraying out the cracks cant tell for sure but it did smell like it but i have to remove the transfer port cover to get to it so i ordered a gasket for that. any help on any of this would be much appreciated.

[@rolandoarcher3265]

I have the exact same 79 mercury 20, just ordered carb kit I’ve had it for over 20 years and had minimal repairs runs like a champ. I do need the kill switch wire that runs from switch to coils. I guess I could use similar gauge wire but needs to insulated.

[@chriseisele9969]

Greatly appreciate the help on learning about the outboards .never a dull moment with you brother

[@Michaelsbackyardmarina]

Glad to help and glad you enjoy the content. Thanks for watching

[@andrwfromme7877]

I have a 1979 Mercury 20 just like the one you were taking apart. Mine has a badly warped head/top cover (not really a cylinder head more of just a cover) and was wondering if you still had the head from this video to sell to me haha. Thanks for uploading these videos they are super helpful.

[@brngrofdeth]

Very good. Looking forward to the head gasket. Much appreciated. Love and blessings from Ontario Canada!

[@Michaelsbackyardmarina]

Coming soon! Thanks for watching

[@k6outdoors]

Really neat seeing the engine completely tore apart

[@Michaelsbackyardmarina]

thanks, didn't know the leaf valves were in the center of a merc.

[@TimsWorkshopTJY]

Hi Mike, I know what you mean on waiting on parts or marine supplies when ordered online. I ordered a 10oz tube of Lubriplate C105 marine grease from Brownell back in your neck of the woods. They put it on a Fedex truck that took 3 weeks to get here. Nobody around here sells it by the tube just by the case.

[@Michaelsbackyardmarina]

shipping time and expense is getting crazy

[@whitehamann.saratov]

hi, do you have a manual with technical specifications for this outboard motor? can you share?

[@badgerbob2226]

some times when a motor is stored on there side or up side down the water from the water pump and exsaust housing can seep in to the pistons and lock up the motor, i hope that makes sense ? keep up the great work sir.

[@Michaelsbackyardmarina]

Great point!

[@antonypereira3853]

Thank you sir happy to get you I have a 40 4hp mercury trying to fix it I wonder how to get the parts?

[@Michaelsbackyardmarina]

oldmercs.com

[@johnmccarthy7931]

Enjoyed the video. Thank you for posting.

[@Michaelsbackyardmarina]

Glad you enjoyed it

[@JSaccount-i4d]

I pulled the 6 nuts for the power head....it certainly isn't just lifting off

[@outboardfixer]

I'd say the gaskets in the manifold side cover we gone and letting water into the cylinders from the water jackets....hence the rust.

[@Michaelsbackyardmarina]

could have been., thanks for watching

[@outboardfixer]

@@Michaelsbackyardmarina Your plugs look like brand new because they are WASHED off with water.

[@steezyfishing]

I just bought a 1971 20hp thunderbolt with the red color, are these pin and condenser or are they electronic ignition?

[@danielrobert7181]

Mercury was nefarious at that time for building it different (from OMC) for the sake of difference. Where operating a single latch would allow complete access to most OMC’s power heads, on the Merc, you would have to deal with a buckle and about 10 bolts/screws of at least 2 sizes. Working with those feels like designs were afterthoughts. Stay safe and be merry !

[@Michaelsbackyardmarina]

making very different is for sure what they did, not sure it was the best idea to make it soooo much different. Thanks for watching

[@270sasquatch]

Why is my pull cord kind of hard to pull and retracting extremely slow. It’s 34 degrees where I’m at. Will this have an affect on it? It’s been sitting for a couple years as well but when I tried yesterday it fired up after a few pulls and didn’t have this problem I’m experiencing today. It was a bit warmer yesterday but not much

[@Michaelsbackyardmarina]

The lube on the starter assembly is stiffer in colder weather sometimes and it probably old too. Clean it and put new lube on it. Thanks for watching

[@whitehamann.saratov]

I really need information about this boat engine

[@TheCooperHouseCharlestown]

i have a 1979 20 hp an dam trying to find a lower unit seal kit. any recommendations? ive been looking in circles on the internet

[@Michaelsbackyardmarina]

marineengine.com

[@gregriba6896]

Hey. I have a 1975 mercury 200 20 hp. The throttle handle just spins. It doesnt catch i can spin it all day. How do u suggest i fix it.

[@Michaelsbackyardmarina]

Sounds like a sheared pin or backed out set screw to me.

[@jordanmercer9821]

Hello, I just got a 79 merc electric start 20 hp tiller with my boat and it needs a new cdi and wiring harness do you have a diagram by chance or know where I can find one

[@Michaelsbackyardmarina]

to be honest I would have to do a google search myself. Check out this website maxrules.com/mercwireindex.php

[@randallparker8116]

You guys don't have a pull start assembly for a Mercury 200 20hp I think it is a 1983 version. I stripped the bolt of course. I was only going to tighten the spring and I messed up the whole thing, tried to make a bolt because I cannot find one. sigh...

[@richardcranium5839]

really sad that old merc was dead. those things are really tough to kill, but someone was just rough enough

[@Michaelsbackyardmarina]

some folks shouldn't be put in the care of some outboards i guess.

[@jamesbuyinghas2wlwoookklkk619]

Hi looking short shaft 20 mercury outboard I have a long shaft good power head

[@Michaelsbackyardmarina]

don't currently have one of those available for sale. Thanks for watching

[@hammer9856]

Best line so far when he finds out they put the reed valves on the crank shaft: "There's a lot of engineering going on here." LMAO Leave it to ivory tower engineers to "improve" things so much that you can't easily fix them. It's far better when those who have to do the regular maintenance on these engines design them.

[@Michaelsbackyardmarina]

AGREED. Thanks for watching

[@robprepp]

Hello from Canada !!Love your videos very helpful I have the exact motor . Do you want to sell me the neutral speed limiter of that 79 ? Hard to find in canada

[@jessicaward7342]

Do you cell parts

[@Michaelsbackyardmarina]

I would if I have them to spare. Email me with what you are looking for.

[@JamesJones-vt3jt]

How much a carburetor

[@Michaelsbackyardmarina]

very expensive

[@АБВГ-1]

Я ваш новый подписчик из России. У меня есть такой Mercury 1972 года.

[@Robert_Rank]

I finally finished fixing and breaking stuff on my 1980 Evinrude 15hp last weekend. Hard to describe that feeling of relief and accomplishment to anyone who has never attempted something similar. Love the videos. Keep doing what you're doing. Thanks kzbin.info/www/bejne/nqDPeo1nqpejjc0

[@Michaelsbackyardmarina]

Will do, thanks for watching. Looks like it runs fantastic.