tale tale stream shoots 20 feet, the water pressure is 7 lbs at idle, bypass valve opening, but the temp of the at the thermostat housings was approx. 73 F
What I have done: I dissasemble the pressure relief valve and rebuilt it-new spring, diaphram and rubbers seals, replaced both thermostats, checked them in hot water and both open at the prescribed temp of 135-140-F.
Cleaned out the thermostat areas and reinstalled the thermostats.
I then closed off the hoses leading to the pressure relief valve (I removed each hose and plugged them. I ran the engine for 10 mins. The area near the thermostats warmed to 83 degrees but no where near 135 F.
I reconnected the pressure relief valve and ran the engine for 15 mins. The engine block did not get hot just warm to the touch again.
There was no debis in the cooling system and it was very clean (I freshwater clean afer each trip out).
I reduced the water pressure by removing the flush port plug, noted the pressure was 3 to 4 psi and temperature around the thermostats warmed to 100 degrees.
Did two other tests to see if maybe an exhaust leak was causing increased water pressure. With everything original I replumbed the relief valve water discharge (which flows constantly at idle) into a bucket with the hose submersed and did not see any bubbles just laminar flow. The second test was with a garden hose plugged into the water tube without the motor running and before the relief valve opened (approximately 4 - 5 psi) noted very little water discharging from the exhaust housing just the tale tale.
Powerhead gaskets looks good.
looking further into blockage around exhaust.
BRP is puzzled and so am I
What I have done: I dissasemble the pressure relief valve and rebuilt it-new spring, diaphram and rubbers seals, replaced both thermostats, checked them in hot water and both open at the prescribed temp of 135-140-F.
Cleaned out the thermostat areas and reinstalled the thermostats.
I then closed off the hoses leading to the pressure relief valve (I removed each hose and plugged them. I ran the engine for 10 mins. The area near the thermostats warmed to 83 degrees but no where near 135 F.
I reconnected the pressure relief valve and ran the engine for 15 mins. The engine block did not get hot just warm to the touch again.
There was no debis in the cooling system and it was very clean (I freshwater clean afer each trip out).
I reduced the water pressure by removing the flush port plug, noted the pressure was 3 to 4 psi and temperature around the thermostats warmed to 100 degrees.
Did two other tests to see if maybe an exhaust leak was causing increased water pressure. With everything original I replumbed the relief valve water discharge (which flows constantly at idle) into a bucket with the hose submersed and did not see any bubbles just laminar flow. The second test was with a garden hose plugged into the water tube without the motor running and before the relief valve opened (approximately 4 - 5 psi) noted very little water discharging from the exhaust housing just the tale tale.
Powerhead gaskets looks good.
looking further into blockage around exhaust.
BRP is puzzled and so am I