ab59
Ensign
- Joined
- May 10, 2017
- Messages
- 979
I just bought an old 1986 Crestliner 14' aluminum boat with a 1985 Evinrude 20hp motor on it. I put a new water pump in it, some new oil seals on the driveline, and changed the lower oil. It started first pull and ran a bit with no problem then began a heavy misfire or cough. It will clean up every now and then and then start the same again. I pulled the plugs and ran a compression test thinking that since the water pump was not pumping water when I brought it home that the PO may have got it hot and blew the head gasket. Both run about 100 psi. I don't know what is good or bad for compression on this motor. When I pulled the plugs I did notice that the bottom plug had some oil on it while the top plug looked brand new. I do not know how long the boat sat since the last time it was used. The tires are dry-rotted to the point that they only hold air for a couple of days so It might have sat quite a while. Where should I start to look? thanks--