200 evinrude

[splitshot]

I have the 200 Evinrude i posted about a few days ago and i decided to pull the heads to see why the compression was low (95 pounds on each cylinder) I found some places on 2 cylinders that looked like a ring or something had bounced around but i am wondering if someone found this and went thru the motor because the piston tops only have carbon on them shouldnt they be dinged up as well ?? i am going to clean the carbon off of the tops tomorrow and look to see if any are oversize...the cylinder themselves are in great shap no scrapes or scratches...i guess i could pull the bypass covers and look for a stuck or broken ring also ...


Here is the first one it is #4 cylinder head

#4 piston

#1 cylinder head

#1 piston

 

[James R]

Re: 200 evinrude

That head doesn't look a happy puppy. A head in that condition could produce other problems. I would look for a replacement. Measuring the bores would be a good idea. This will tell you the wear condition. If all the cylinders are showing the same compression then it is unlikely that you have a broken ring, worn perhaps but not broken. 95 PSI on all is not bad. A dose of Sea Foam may improve the readings.
If you really want to improve the compressions then a rebuild would be in order.

 

[splitshot]

Re: 200 evinrude

what do you think could have dinged the head ?? i probably will end up going thru it just to know that its good...since i'm going to be searching for heads what numbers are the "good compression heads" thanks for the help

 

[daselbee]

Re: 200 evinrude

Sorry, I am not following your meaning by "dinged the head". Can you post a pic of a "good", non-dinged cylinder from the same head?

 

[splitshot]

Re: 200 evinrude

look at the first picture and the third picture around the where the head gasket seals the cyliner around the metal ring you will see dings where something was bouncing around the combustion chamber and hitting the head and pitted it