sheetrock0958
Recruit
- Joined
- Jun 15, 2009
- Messages
- 3
Hi All,
I'm new to the Iboats forum and this is my first post here.
I have a couple of questions regarding a 1981 Evinrude E35ELCIG outboard engine that I'm hoping someone can help me out with.
The motor has been giving me trouble for the last year or two at startup and idle. I did a complete carburator tear-down, cleaning, and reassembly with new gaskets, needle and seat, float, etc. I set the low speed needle as indicated in the original evinrude manual and also did the 'fine tuning' as recommended in the manual with no luck. It still runs like crap. I have a terrible time getting the engine to start... whether it is a cold start or starting once engine has been at operating temp. Also, the engine does not want to troll along at low RPM... it will continually die. Also, I have noticed gas floating on the surface of the water from the motor... It isn't leaking it, so I'm assuming that it must be coming from the exhaust.
Next step I took was to do a compression test when the engine was cold. When I removed the lower sparkplug, I noticed that the plug was wet with what appeared to be a drop of water. I proceeded to check the compression of both cylinders and they measured 78 psi (lower) and 76 psi (upper). To me, that sounds extremely low as I would expect to see around the region of 115 psi, but I have read several posts that indicate as long as the cylinders are within 10% of eachother, they should be fine. After the compression check, I replaced the plugs and fought with the engine for a while to get it started (the usual) and then let it warm up to operating temperature, shut it off and did another compression check. Much to my surprise, the compression actually fell when the engine was hot to 58 psi (lower) and 56 psi (upper).
So after the long story, here are my questions:
It seems fairly obvious to me that there must be an internal head gasket leak that is letting water into the cylinder(s)... is this a correct assumption? I am making this assumption based on the droplet of water in the lower cylinder as well as the "gas-trail" the motor is leaving in the water.
Can I replace just the head gasket while the power head is still attached to the outboard assembly or do I need to remove it?
Can I replace the two pistons and rings while the powerhead is still attached to the outboard assembly?
What are the chances that the pistons/rings are still "ok" and the low compression is from the bad head gasket? While I'm replacing the head gasket should I also just go ahead and replace the pistons/rings while having the engine open?
Sorry this post got so long. I look forward to any suggestions you may have.
Thank You.
I'm new to the Iboats forum and this is my first post here.
I have a couple of questions regarding a 1981 Evinrude E35ELCIG outboard engine that I'm hoping someone can help me out with.
The motor has been giving me trouble for the last year or two at startup and idle. I did a complete carburator tear-down, cleaning, and reassembly with new gaskets, needle and seat, float, etc. I set the low speed needle as indicated in the original evinrude manual and also did the 'fine tuning' as recommended in the manual with no luck. It still runs like crap. I have a terrible time getting the engine to start... whether it is a cold start or starting once engine has been at operating temp. Also, the engine does not want to troll along at low RPM... it will continually die. Also, I have noticed gas floating on the surface of the water from the motor... It isn't leaking it, so I'm assuming that it must be coming from the exhaust.
Next step I took was to do a compression test when the engine was cold. When I removed the lower sparkplug, I noticed that the plug was wet with what appeared to be a drop of water. I proceeded to check the compression of both cylinders and they measured 78 psi (lower) and 76 psi (upper). To me, that sounds extremely low as I would expect to see around the region of 115 psi, but I have read several posts that indicate as long as the cylinders are within 10% of eachother, they should be fine. After the compression check, I replaced the plugs and fought with the engine for a while to get it started (the usual) and then let it warm up to operating temperature, shut it off and did another compression check. Much to my surprise, the compression actually fell when the engine was hot to 58 psi (lower) and 56 psi (upper).
So after the long story, here are my questions:
It seems fairly obvious to me that there must be an internal head gasket leak that is letting water into the cylinder(s)... is this a correct assumption? I am making this assumption based on the droplet of water in the lower cylinder as well as the "gas-trail" the motor is leaving in the water.
Can I replace just the head gasket while the power head is still attached to the outboard assembly or do I need to remove it?
Can I replace the two pistons and rings while the powerhead is still attached to the outboard assembly?
What are the chances that the pistons/rings are still "ok" and the low compression is from the bad head gasket? While I'm replacing the head gasket should I also just go ahead and replace the pistons/rings while having the engine open?
Sorry this post got so long. I look forward to any suggestions you may have.
Thank You.
