ran out of oil and engine does not go as fast and the rpms are lower

[86bayyliner]

Re: ran out of oil and engine does not go as fast and the rpms are lower

THATS WHAT THE PISTON LOOKS LIKE..

 

[gene8084]

Re: ran out of oil and engine does not go as fast and the rpms are lower

Jeez, get a new friend to partner with.

 

[kenmyfam]

Re: ran out of oil and engine does not go as fast and the rpms are lower

View attachment 36974 THATS WHAT THE PISTON LOOKS LIKE..

Ouch !!!!

 

[86bayyliner]

Re: ran out of oil and engine does not go as fast and the rpms are lower

I Know .. Im A Mechanic And I Know My Way Ariund The Wrenches And He Is A Pizza Man.. Go Figure.. I Have The Manule To Take It Apart But Do I Really Need Th Take The Whole Powerhead Off?? I Would Like To Avoid That And Just Split The Case And Remove And Reinstall The Piston.. For Sure Im Going To Hon It Out And Mic Up The Rings To Make Sure It Seals.. I Work On Transmissions And I Have To Make Sure The Sealing Rings On The Center Support And Drums Seal Good,

 

[kenmyfam]

Re: ran out of oil and engine does not go as fast and the rpms are lower

I Have The Manual To Take It Apart But Do I Really Need Th Take The Whole Powerhead Off??

My opinion.....Yes. You should also check the other cylinders for excessive wear while you are in there.

 

[iwombat]

Re: ran out of oil and engine does not go as fast and the rpms are lower

Opinions aside. There's simply no way to do it with the powerhead still on.

 

[kenmyfam]

Re: ran out of oil and engine does not go as fast and the rpms are lower

Agree. Said "My Opinion" in case somebody knows better !!! I certainly don't.

 

[86bayyliner]

Re: ran out of oil and engine does not go as fast and the rpms are lower

ok i will update tomorrow with hopefully good news//////////

 

[iwombat]

Re: ran out of oil and engine does not go as fast and the rpms are lower

Ok, for the last time. The WHOLE powerhead has to come off, be put on a bench, and completely disassembled. You then need to take the cases into a MARINE machine shop and have them bored out to match an oversized piston (or two, or three). The shop will tell you which size you need to buy, and they'll need them before they do any machining. You then need to reassemble the powerhead, again on the bench. Once that's all finished, place it back over the exhaust adapter plate and re-attach.

Honestly, from the questions you're asking I think you're going to be in way over your head.

 

[86bayyliner]

Re: ran out of oil and engine does not go as fast and the rpms are lower

Not really in over my head. I know my way around tools and I was just asking if I could do it with the engine still on the boat. No need to show some !!!!!!!! Points.

 

[Fl_Richard]

Re: ran out of oil and engine does not go as fast and the rpms are lower

Taking the power head off sounds like a big deal but it's much easier than you think.

 

[wilde1j]

Re: ran out of oil and engine does not go as fast and the rpms are lower

Without an OEM shop manual, you're wasting your money on parts, but , hey, it's your money. "Knowing your way around tools" and transmissions is no help here.

 

[daselbee]

Re: ran out of oil and engine does not go as fast and the rpms are lower

Not really in over my head. I know my way around tools and I was just asking if I could do it with the engine still on the boat. No need to show some !!!!!!!! Points.

Notice he says "with the engine still on the boat".

You can leave the ENGINE on the boat, but you HAVE to take the powerhead off the midsection of the engine and repair it on the bench. You cannot split the powerhead crankcase halves with the powerhead still attached to the midsection.

Does that clear it up any?

 

[daselbee]

Re: ran out of oil and engine does not go as fast and the rpms are lower

Another thing. Evinrude did not make a 250 in 1990. The pics you show are of a crossflow, and the 225 and 200 hp engines were loopers. My bet is that if it is a 1990 model, it is a 150 HP.
Post the model number found on the engine bracket.
Unfortunately, I too think you may be in over your head.

 

[86bayyliner]

Re: ran out of oil and engine does not go as fast and the rpms are lower

Yea I hit the 2 instead of the 1. It's a 150.

 

[daselbee]

Re: ran out of oil and engine does not go as fast and the rpms are lower

Another thing...I looked at your pic again. I really think you will never get the head gasket/o-rings to seal properly. The tops of the cylinders look awfullly beat up.

 

[HybridMX6]

Re: ran out of oil and engine does not go as fast and the rpms are lower

dasel, I was wondering/thinking the same thing. To the OP, what happened to that engine block? Looks like it's taken a very brutal beating.

 

[86bayyliner]

Re: ran out of oil and engine does not go as fast and the rpms are lower

It is fine. I know it looks like that in the pictures but it's not. Spiitting the powerhead right now needs a little persuasion..

 

[86bayyliner]

Re: ran out of oil and engine does not go as fast and the rpms are lower

It wasn't that bad of a job. The hardest part about it was getting the power head off. I pot it Back on and it runs. I just have to adjust the butterflys in the carbs. Does anyone have any good tips on how to adjust them correctly??

 

[daselbee]

Re: ran out of oil and engine does not go as fast and the rpms are lower

It wasn't that bad of a job. The hardest part about it was getting the power head off. I pot it Back on and it runs. I just have to adjust the butterflys in the carbs. Does anyone have any good tips on how to adjust them correctly??

What all did you end up doing? Just one piston?