Chinewalker
Fleet Admiral
- Joined
- Aug 19, 2001
- Messages
- 8,902
A friend of mine dropped off his old Powercat to have me get his twin 1962 Evinrude 40s going. Mags have been rebuilt, lower units resealed, new impellers installed, carbs rebuilt with new ethanol resistant kits, etc.
Port side motor starts easily and seems to run well on both cylinders. Pumps lots of water, too!
Starboard side motor - not so much. Starts VERY hard. Runs on one cylinder and also overheats.
One cylinder issue: So far, I have checked for spark - good on both cylinders... Checked compression, about 95 psi in both holes. I do know it is the bottom cylinder with the issue. Almost suspect the bottom main seal leaking so that it runs lean. Grasping at straws at this point.
Overheating issue: The pump is actually pumping - I pulled the cap off the top of the cylinder head and pulled the thermostat, started the motor and water gushed out the top of the head. For some reason the water just doesn't seem to be circulating. I suspect a blockage somewhere - not sure if I should pull the exhaust cover or try pulling the powerhead off the mid. I did pull the cylinder head and the coolant passages I could see were spotless in both the block and the head.
Very frustrated with the beastie at this point... I'm thinking I'll have to pull the powerhead to see if there's any old impeller bits blocking up the works, and also to see if the lower main seal is intact.
Port side motor starts easily and seems to run well on both cylinders. Pumps lots of water, too!
Starboard side motor - not so much. Starts VERY hard. Runs on one cylinder and also overheats.
One cylinder issue: So far, I have checked for spark - good on both cylinders... Checked compression, about 95 psi in both holes. I do know it is the bottom cylinder with the issue. Almost suspect the bottom main seal leaking so that it runs lean. Grasping at straws at this point.
Overheating issue: The pump is actually pumping - I pulled the cap off the top of the cylinder head and pulled the thermostat, started the motor and water gushed out the top of the head. For some reason the water just doesn't seem to be circulating. I suspect a blockage somewhere - not sure if I should pull the exhaust cover or try pulling the powerhead off the mid. I did pull the cylinder head and the coolant passages I could see were spotless in both the block and the head.
Very frustrated with the beastie at this point... I'm thinking I'll have to pull the powerhead to see if there's any old impeller bits blocking up the works, and also to see if the lower main seal is intact.
