1992 Evinrude low compression and solutions for it. PICTURES ADDED

jonscott

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Mar 18, 2009
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Re: 1992 Evinrude low compression and solutions for it.

Re: 1992 Evinrude low compression and solutions for it.

The cylinder walls are extremely smooth, no scoring. The spark plugs look like i think they should.
 

jonscott

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Mar 18, 2009
Messages
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Re: 1992 Evinrude low compression and solutions for it. PICTURES ADDED

What are signs that the motor overheated? Would the cylinders be scarred from the piston rings deforming?
 

Rick.

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Re: 1992 Evinrude low compression and solutions for it. PICTURES ADDED

Hello. I've looked at your pictures and I don't see any thing obvious that troubles me. If you see something wrong by all means bring it to our attention. I think I see some rust in your cylinders but I can't be certain. In any case it only looks like surface rust and not pitting the walls. Can you see any damage to the rings? Do they look like they are free to move a little or tight to the cylinder? It looks like there is a little bit of loose scale in the water way of the cylinder head that you should clean out. My vote would be to slap it back together and try to get it firing again. You have mentioned cleaning the carb. and I'm wondering if you set your slow speed needle to the manufactures spec., and then made final adjustments? I have been sort of waiting for someone more knowledgable than I to comment about the pictures (internals) and hoefully they still will. Rick.
 

wbeaton

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Jul 30, 2006
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2,332
Re: 1992 Evinrude low compression and solutions for it. PICTURES ADDED

The rust concerns me. Take a close look at your head gasket or water jacket gasket (if it has one). Could be its blown. Also look at the rings. They could be rusted to the cylinder and causing the problem. The cylinder walls seem ok.
 

jonscott

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Mar 18, 2009
Messages
26
Re: 1992 Evinrude low compression and solutions for it. PICTURES ADDED

Can anyone suggest the proper repair manual for this motor? I have looked at some on this site but am not sure which is correct.
 

jonscott

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Joined
Mar 18, 2009
Messages
26
Re: 1992 Evinrude low compression and solutions for it. PICTURES ADDED

Well, the water pump was destroyed. I replaced the water pump and put a new head gasket on. It started and ran like a top on the first pull.

Thank you all very much for your help!
 

Rick.

Captain
Joined
Jul 30, 2006
Messages
3,740
Re: 1992 Evinrude low compression and solutions for it. PICTURES ADDED

Great to hear of your success. I'm happy for you. Thanks for letting us know. I think you will be able to find an OMC repair manual on eBay. Get it for your specific HP and Year. All the best. Rick.
 
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