dspracing
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- Apr 6, 2010
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98 Mercrusier 7.4 MPI
Bravo one, side water pickup
The issue began on our last trip out. The alarm buzzer would go off while getting on plane. After installing new gauges it turns out my water temp is hovering around 210.
Temp is OK at idle
Temp is OK at cruise speed
Starboard side exhaust riser warmer than port side but not overly hot, I can still rest my hand on it. Seems to me like this would point towards low flow?
Installed a new impeller assembly yesterday. The old impeller was on its way out but completely intact. The issue remained the same.
Hoses from the thermostat housing to the exhaust risers are clear/no restrictions.
Did my internet research but no clear path to a solution so I thought I would see what the brain trust had to say. Here is what I am suspecting could be the culprits. What do you all think I should throw parts at first?
Blockage between drive and impeller causing reduced flow
Bad/failing water circulating pump
Bad thermostat
Bravo one, side water pickup
The issue began on our last trip out. The alarm buzzer would go off while getting on plane. After installing new gauges it turns out my water temp is hovering around 210.
Temp is OK at idle
Temp is OK at cruise speed
Starboard side exhaust riser warmer than port side but not overly hot, I can still rest my hand on it. Seems to me like this would point towards low flow?
Installed a new impeller assembly yesterday. The old impeller was on its way out but completely intact. The issue remained the same.
Hoses from the thermostat housing to the exhaust risers are clear/no restrictions.
Did my internet research but no clear path to a solution so I thought I would see what the brain trust had to say. Here is what I am suspecting could be the culprits. What do you all think I should throw parts at first?
Blockage between drive and impeller causing reduced flow
Bad/failing water circulating pump
Bad thermostat