E8RCRM 1984 8hp
I got this motor running recently and all seemed good until I checked the head temperature and found 280*. It's running in a 5 gallon bucket and it has a strong telltale stream.
Removed a thoroughly dead and rotted thermostat and started it up and water gushed out of the housing so I replaced the cover and it heated right up again and after about a minute it was back to 240+. The water pump is definitely moving water.
I pulled the exhaust cover and the head and inspected all of the water passages from the water tube to the escape at the bottom of the head. No obstructions. Replaced all of the gaskets with new ones.
It fired right up and ran way better than before which I had thought was pretty good to begin with (that old head gasket was pretty well cooked) but after a minute or two it started heating up so i bumped the RPMs up to see if I could coax some more water through but the temp just shot back up and I killed it at 200*.
Someone told me that when super lean these motors run smooth but heat up really fast. I'm missing the cover for the air box. I didn't bother trying to tune it after putting it back together since it fired up quickly and ran smooth.
Opinions on A/F being my issue or is there something else? The only other thing that comes to mind would be bubbles from the exhaust interfering with the water intake but I know it's pulling water because it gushed out of the thermostat hole when that was open and it is peeing.
I got this motor running recently and all seemed good until I checked the head temperature and found 280*. It's running in a 5 gallon bucket and it has a strong telltale stream.
Removed a thoroughly dead and rotted thermostat and started it up and water gushed out of the housing so I replaced the cover and it heated right up again and after about a minute it was back to 240+. The water pump is definitely moving water.
I pulled the exhaust cover and the head and inspected all of the water passages from the water tube to the escape at the bottom of the head. No obstructions. Replaced all of the gaskets with new ones.
It fired right up and ran way better than before which I had thought was pretty good to begin with (that old head gasket was pretty well cooked) but after a minute or two it started heating up so i bumped the RPMs up to see if I could coax some more water through but the temp just shot back up and I killed it at 200*.
Someone told me that when super lean these motors run smooth but heat up really fast. I'm missing the cover for the air box. I didn't bother trying to tune it after putting it back together since it fired up quickly and ran smooth.
Opinions on A/F being my issue or is there something else? The only other thing that comes to mind would be bubbles from the exhaust interfering with the water intake but I know it's pulling water because it gushed out of the thermostat hole when that was open and it is peeing.