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.

nymack66 · #3 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 · #4 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 · #5 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 · #6 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.

nipper · #7 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.

randlemanboater · #8 12-02-2009, 03:39 PM

Good luck on the project.

spareparts · #9 12-02-2009, 05:05 PM

OMC used to offer a thicker than standard head gasket for some of their motors for comercial use or when using lower octane fuel, I don't know if they are still available, but it would be what you need after decking the block.

willy · #10 12-02-2009, 09:10 PM

good for you Mack, I would love to have the time and smarts to do that. Good luck and I hope it goes well for you. At the very least you will have learned a lot more than most of us will have ever learned.