I am going to help a friend with his 1990 Yamaha 2 cylinder 40hp this Thursday. He got it for a 100 and done a fantastic job cleaning and painting among others things. He however used a cordless impact gun to try and remove corroded head bolts 😱😱😱. He snapped 3 of them. I am going to remove the power head and use a drill press to drill them out, tap the threads and get it done for him. His paint job is gorgeous along with new decals.
Yikes on the steel wire brush. It’s harder than the aluminum. I use a fiberglass strand wheel for that. Takes off the junk, but doesn’t hurt the soft aluminum.
Awesome video man! I’m about to do mine here in a week or so. When you said at the end to put a little oil, did you mean on the 12mm bolts or somewhere else?
@@ChrisWrightDVM using a smaller ratchet or wrench and not applying too much force to crack them loose. I would not recommend using an impact driver on them
I thought I replied but I used a clean microfiber towel or shop towels and then coated them with a little bit of tcw3 to prevent corrosion compressed air could work just spin the crank to make sure nothing got past the piston rings
After doing the head gaskets it was around 120-135*f at idle. At around 140*f the thermostats open up allowing the water to flow through. Before it was up in the high 100s like 160-180 it was almost too hot to touch
Just replaced head gasket and water jacket gasket and I’m still getting what looks like water in cylinder 2.. All compression was 108-110 on all cylinders.. Any help is greatly appreciated!!
Sounds like a possible warpage on the water jacket cover or a hairline crack in the water jackets. Did you check for the warpage on the water cylinder heads?
Check your exhaust manifold, it has walls in it to cycle water, they can corrode and begin letting water into the cylinder. Be careful with the bolts though.
Sorry for the long reply I believe it is this one 6G5-11193-A0, I preferred to buy an entire rebuild kit since most of the gaskets can get reused and are good to have on hand (Powerhead Gasket Kit for Yamaha V6 150-200hp EFI 67H-W0001-00-00)
@@Sportsmans_Paridise_Outfitters I used some penzoil tcw3 two stroke oil on the head bolts, manual states Yamaha 2 stroke tcw3 oil im assuming it’s so you don’t damage the threads when torquing the bolts down and for better torque reading loctite was just for the cylinder head cover bolts
Possibly yess I think it’s cheaper if you get a rebuild kit for the entire motor than to try and piece them out separately. That way you should have most seals and gaskets used when tearing the motor apart
That looks like an old two cycle you I thought the young generation was for a clean environment you should throw that in the garbage and go four stroke it's much better for the environment they need to pass some kind of law banning all two cycle engine's in the water
You gonna pay for him to get a 4 stroke? How about you quit worrying about the working man running a 2 stroke motor and go bitch at the 1% who uses private jets to fly from one of their houses to another.
2 strokes are faster and lighter. Way better than a 4 stroke. 4 stroke only good on fuel consumption. Your dream will come true some day. They are making a lot less 2-strokes and a lot of people converting to a 4-strokes.
@@skip3662 brake cleaner and some shop towels should then coat with some oil after. Compressed air could work but could also push the grit deeper in there. Rotate the the prop or driveshaft the the pistons can move and get a better clean
Exactly the instructions I was looking for. Thank you.
Glad I could help!
I am going to help a friend with his 1990 Yamaha 2 cylinder 40hp this Thursday. He got it for a 100 and done a fantastic job cleaning and painting among others things. He however used a cordless impact gun to try and remove corroded head bolts 😱😱😱. He snapped 3 of them.
I am going to remove the power head and use a drill press to drill them out, tap the threads and get it done for him. His paint job is gorgeous along with new decals.
Sounds like a fun project!! I was pretty scared with snapping the head bolts but I just used a normal ratchet.
This is absolute quality here! You deserve more subscribers for sure! Your clear, and too the point. :)
@@dangerousdeo5113 Thank you! Tried to make it as simple as I could with no extra fluff.
Nice video man. You speak clearly for your viewers to understand, and your work looked thorough. Im gonna hit subscribe 👍
I appreciate that thank you!
I have an 03 vmax thats getting this treatment next week. Great vid!
Thank you, hopefully it’ll run like new!!
Yikes on the steel wire brush. It’s harder than the aluminum. I use a fiberglass strand wheel for that. Takes off the junk, but doesn’t hurt the soft aluminum.
Intelligent young man! great and very informative video. Excellent presentation! Good job!
Glad you liked it!
Great job young man, doing by the book!!
Thank you!!
Dude what an awesome video!! Explained everything perfectly.
Do you not use gasket sealant for the cylinder gasket or water jacket gasket? ALSO what did you get that online pdf of your motor? Thanks man
Awesome video man! I’m about to do mine here in a week or so. When you said at the end to put a little oil, did you mean on the 12mm bolts or somewhere else?
Yeah the oil is for the 12mm head bolts. The 10mm jacket cover bolts take the high temp thread sealant. Good luck!
Top stuff.
Awesome video
G'day from Australia 🇦🇺
Thank you !👍 Cheers from Florida!
good job. am surprise an 23 yr old oil injected motor still idles that good.
Thank you!
Excellent video, except, you skipped over the problematic part of removing the bolts.... how did that go? Any tricks to not snapping one? Thanks....
@@ChrisWrightDVM using a smaller ratchet or wrench and not applying too much force to crack them loose. I would not recommend using an impact driver on them
Thank you! My Tohatsu M50d really needed to be reworked. Getting a small amount of water in the bottom cylinder. Should be good to go now!
Glad it helped!
Thanks doing my 225 yamaha this weekend 🇺🇸
Good luck!
Great instructions and video
Thank you
Glad it could help out thank you!
What’s the best way to clean the bore’s once you finish sanding; Compressed air followed by brake clean ?
I thought I replied but I used a clean microfiber towel or shop towels and then coated them with a little bit of tcw3 to prevent corrosion compressed air could work just spin the crank to make sure nothing got past the piston rings
wow man, you are great! keep it up
Thanks a lot!
What tool did you use to clean between the cylinders of the block?
Assortment of screwdrivers, picks, and a thin wire brush then flushed out with water. I would suggest a vacuum to suck all the crude from the cowling
what was the temp running? what's normal operating temp?
After doing the head gaskets it was around 120-135*f at idle. At around 140*f the thermostats open up allowing the water to flow through. Before it was up in the high 100s like 160-180 it was almost too hot to touch
Just replaced head gasket and water jacket gasket and I’m still getting what looks like water in cylinder 2.. All compression was 108-110 on all cylinders.. Any help is greatly appreciated!!
Sounds like a possible warpage on the water jacket cover or a hairline crack in the water jackets. Did you check for the warpage on the water cylinder heads?
Check your exhaust manifold, it has walls in it to cycle water, they can corrode and begin letting water into the cylinder. Be careful with the bolts though.
Where you losing compression in any of the cylinders before this?
I didn’t do a compression test beforehand but the engine sounded strong I don’t believe it had any compression issues
Can I call you and ask you a question about my motor overheating
Thank you for say the 15nm 11ft ponds an all u did me a solid bro gods great ❤
😊❤️ You are an expert ‼️
Did you use gasket sealer on a thermostat paper gasket?
Nope just the plain gasket
@@austin.rivera Thank you very much, great job, i will be doing this tomorrow. Super helpful video .
You’re welcome good luck and have fun !
Great video.
Best vid iv seen!
Water line on top of the head what that for can i plug it off
I would have to check the manual but I think it’s for a sensor so I don’t believe you can plug it
Thank you for sharing this video
My pleasure!
Good Job!!!!
What’s the part number for the water jacket gasket?
Sorry for the long reply I believe it is this one 6G5-11193-A0, I preferred to buy an entire rebuild kit since most of the gaskets can get reused and are good to have on hand (Powerhead Gasket Kit for Yamaha V6 150-200hp EFI 67H-W0001-00-00)
Nice work!!!
Thank you! Cheers!
Wauwtuh boat mechanic 👌🏼💯✔️
Wauwtuh
Very nice buddy...thank u so much ...
Very nice job young man
Thank you!
Muy Bien explicado more clear explanations
It's for sale?
Not yet
Where did you get the pdf at?
I don’t remember the exact website but I got it from google I just searched for the maintenance manual on there.
@@austin.rivera did you end up putting the loctite on the head bolts as well?
@@Sportsmans_Paridise_Outfitters I used some penzoil tcw3 two stroke oil on the head bolts, manual states Yamaha 2 stroke tcw3 oil im assuming it’s so you don’t damage the threads when torquing the bolts down and for better torque reading loctite was just for the cylinder head cover bolts
Thank you
Awsome
I was gifted a mariner5.
Haven't a clue where to start....
If it runs I say start with replacing the spark plugs, checking lower unit oil, and clean the carbs if it applies.
@@austin.rivera definitely needs to be broken down. I'm afraid to even try to pull.
Any seals I'll need to replace?
Possibly yess I think it’s cheaper if you get a rebuild kit for the entire motor than to try and piece them out separately. That way you should have most seals and gaskets used when tearing the motor apart
@@austin.rivera awesome idea!!!
Gang gang
🤘🏽🤘🏽
That looks like an old two cycle you I thought the young generation was for a clean environment you should throw that in the garbage and go four stroke it's much better for the environment they need to pass some kind of law banning all two cycle engine's in the water
You gonna pay for him to get a 4 stroke? How about you quit worrying about the working man running a 2 stroke motor and go bitch at the 1% who uses private jets to fly from one of their houses to another.
2 strokes are faster and lighter. Way better than a 4 stroke. 4 stroke only good on fuel consumption. Your dream will come true some day. They are making a lot less 2-strokes and a lot of people converting to a 4-strokes.
Womp womp
What type of grit sandpaper did u use to sand the heads
320 grit then 400 grit I wouldn’t go lower than that.
@@austin.rivera ty for tge response and answer.
@@austin.riverabest way to clean the bore afterwards ? Compressed air then brake clean ? Just wanna make sure I get any grit out thx
@@skip3662 brake cleaner and some shop towels should then coat with some oil after. Compressed air could work but could also push the grit deeper in there. Rotate the the prop or driveshaft the the pistons can move and get a better clean
@@austin.rivera that makes sense, I’ll stuff some cloth in there prior to sanding as well. Thanks Austin, 🇦🇺 👍👍
Thank you
You’re welcome!