Evinrude 1987 140 v4 Rebuild

nymack66 · #1 12-02-2009, 08:22 AM

Previously I have posted the failure of my power head and have since replace it with a rebuild which by the way is working great.
I traded two older motors at the time with PowerHead Exchange out of Tampa and kept my blown power-head with this project in mind.
I will start rebuilding/assembly it from prop up. Trust me this is going to be long term project or if the 49ers sucks on Sundays then it will progress faster.
The objective is to apply what I have learned and hopefully own a engine I can be proud of, I have done my home work in regards to acquiring the parts and everything plus sum for this project.
This weekend I hit jackpot with an identical year/make/model motor minus power head (blown) it is in very good condition.
I will post as I go along so far the power head was in a machine shop hone and corrected a single out of round cylinder. All cylinders are bored .30 over.
I will be experimenting with soda/media blasting starting with the Block and the rest of the parts, I opt out the acid bath method since I will still need to clean the rest of the parts for painting.
I am open for ideas on the painting and colors for both engine, LU, and cowling's.
If I bore anyone to death please pardon me, this for me personally it is a challenge whilst I know I am not re-inventing the wheel I am excited for now who knows down the road ?
Here she is all blown up!

Same Block re-bore and so call clean I will soda blast it

Lots of corrosion around the outer sleeves or water way ..

The engine shop shave both heads one is perfect one is like below I will not use this since I now have one from the donor motor in excellent condition

Perfect

Wish me luck..

parishht · #2 12-02-2009, 11:29 AM

I wish I had the time, I would rebuild my Evinrude 150.

Keep this thread going, maybe it will inspire me to shift my priorities.

nipper · #3 12-02-2009, 11:29 AM

Good luck NYMack. As far as painting and colors, I would go with with the original 1987 color scheme and cowling stickers.

nymack66 · #4 12-02-2009, 11:41 AM

Quote:

Originally Posted by parishht

I wish I had the time, I would rebuild my Evinrude 150.

Keep this thread going, maybe it will inspire me to shift my priorities.

I will be happy to help you, Let me know what you need and we go from there maybe the parts are interchangeable in that case I have plenty of spares ..

THEFERMANATOR · #5 12-02-2009, 12:45 PM

Definately get that block decked. I can see where it would blow out a head gasket on 1 & 3. Carbs will be the critical part of any rebuild as they seem to cause most powerheads to fail.

nymack66 · #6 12-02-2009, 12:49 PM

Quote:

Originally Posted by THEFERMANATOR

Definately get that block decked. I can see where it would blow out a head gasket on 1 & 3. Carbs will be the critical part of any rebuild as they seem to cause most powerheads to fail.

Can you explain to me please what to look for when you say decked ? The Block was worked on by a Machine shop and told me its good to go..I had concerns about the pitting around the sleeves close to the gasket area ? I will never second guess your words of wisdom..
Thanks Ferm

Skools Out · #7 12-02-2009, 01:05 PM

decked means where the heads bolt on have the block and cylinders cut down to get a better surface for the head gaskets to seal too. with your heads shaved it will run hot and plus eat starters due to raised compression. may be really hard to start when motor is warm due to the starter may not be able to turn over the motor. they do make a cylinder repair ring where you cut down the out block casting on the cylinder sleeves and you insert these rings so that your head gaskets will seal correctly. but you need new or good used heads. sell those to some poor other boater with low compression worn motor.

nymack66 · #8 12-02-2009, 01:12 PM

Quote:

Originally Posted by Skools Out

decked means where the heads bolt on have the block and cylinders cut down to get a better surface for the head gaskets to seal too. with your heads shaved it will run hot and plus eat starters due to raised compression. may be really hard to start when motor is warm due to the starter may not be able to turn over the motor. they do make a cylinder repair ring where you cut down the out block casting on the cylinder sleeves and you insert these rings so that your head gaskets will seal correctly. but you need new or good used heads. sell those to some poor other boater with low compression worn motor.

Thanks for the explanation, I do have two heads not shaved so I will use those and sell the shaved ones, in regards to the rings you mentioned do you know where I can find it ? This is the only part that have me nervous and both you and Ferm the pros jumped on it I love it ..You Guys do know your stuff thanks for all the help. There is a Guy with 2 nice clean power heads both big bore bummer since I do NOT have parts for a big bore ..

THEFERMANATOR · #9 12-02-2009, 01:59 PM

That pitting around the sleeves on #1 and #3 can cause head gaskets to blow out like no tommorrow. When I say decked I prefer the method where they use the big sheet of sandpaper on a granite top. This way you only take off what is needed, most of the time it's less than .002 thousandths to clean one up this way. And the V-4 loopers have REALLY high compression to begin with, roughly 140-145 on a good healthy one. Mine pops off at 155 and it is a B!TCH to start up, it takes 2 good batteries to kick it over with 2 guage battery cables. But it will SCREAM on the top end

. Like I said earlier though, the carbs will drive you nuts most likely. Most everybody I've talked to has had problems after building one of these V-4 loopers and had to re-jet the carbs to fatten em up on the main and intermediate, but lean it out at idle.

randlemanboater · #10 12-02-2009, 03:39 PM

Good luck on the project.