Noticed the water was not coming out of the pee hole so I took the water pump apart. The impeller was only two years old and had not been used that much. The flappers on the impeller had all broken off. I replaced it and looked up in the water tube for pieces of the impeller but didn't see anything. Put in back in a barrel and it was pumping water out the pee hole pretty good. Took it out in the lake and after about 5 minutes at full throttle the motor died and locked up. After it cooled it freed up. Up until it overheated I was seeing water being pumped out of the pee hole.
Here is what I found:
1. Water pump impeller ok with no damage.
2. Pulled head and cylinders look fine with no scoring or discoloration.
3. Use compressed air to verify the water tube was clear. Also blew air down into the exhaust thru the small hole at the botoom of where the head mounts. No debris found either.
4. Thermostat was clear of any debris but looked like it wasn't opening when put in boiling water.
Based on what I found I think the thermostat failed to open. I will replace the head gasket and thermostat and try to start it. I hope the rings are ok and will run a compression check when I get it back together.
What do you guys think?
Bill
Here is what I found:
1. Water pump impeller ok with no damage.
2. Pulled head and cylinders look fine with no scoring or discoloration.
3. Use compressed air to verify the water tube was clear. Also blew air down into the exhaust thru the small hole at the botoom of where the head mounts. No debris found either.
4. Thermostat was clear of any debris but looked like it wasn't opening when put in boiling water.
Based on what I found I think the thermostat failed to open. I will replace the head gasket and thermostat and try to start it. I hope the rings are ok and will run a compression check when I get it back together.
What do you guys think?
Bill