Overheat issue…maybe
#11
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The OMC power steering & oil cooler are bigger than the single merc combo cooler off the 330hp motors so I'm still using the OMC coolers so the oil flow hasn't changed. I also replaced the impellor & housing just to rule it out... no change. I have the intake hose from the transom going to the top port on the sea pump & the lower port connected to the coolers/engine. This is a v belt drive sea pump so I believe this is the correct flow? Wouldn't it not cool the motor @ all if it was hooked up backwards?
Do I need to remove the drive to check for the "Bravo Fever" mentioned? Can someone walk me through how to check this.
Do I need to remove the drive to check for the "Bravo Fever" mentioned? Can someone walk me through how to check this.
#13
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The other possibility is that the hose between the transom & bellhousing is collapsing under suction. I've heard about that one.
But, before I started disassembling anything, I'd fix the electrical issue to make sure I knew what the temp was at all times.
#14
What i was trying to say was check the incoming water volume coming into the cooler (apollard basically said it too) so I would dump it in a 5 gallon bucket and see how long it takes to fill up and garden hose or otherwise cool the system while you're testing. Those pumps should easily hit 20 gals per min. They're designed for 27 if my memory serves.
Russ
Russ
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Mr Cool for all of your heat exchangers and oil coolers , transmission coolers and more!
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Mr Cool for all of your heat exchangers and oil coolers , transmission coolers and more!
Locations in: Florida, Michigan & Washington!
#15
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Still chasing this problem. Spliced into the wire harness & installed another jumper from the ground wire directly to the battery….no difference. The temp sender does have a sealent on the threads. Should I clean that stuff off & try it without any. Maybe that’s not allowing it to ground properly.
I ran water from the intake back out the transom / drive & the flow seems normal. I haven’t tried filling the 5 gallon bucket yet. I did have a inline hose adapter in that intake hose & wonder if its leaking & allowing loss of suction. I ordered a merc intake hose & will leave that adapter out & try it again.
I ran water from the intake back out the transom / drive & the flow seems normal. I haven’t tried filling the 5 gallon bucket yet. I did have a inline hose adapter in that intake hose & wonder if its leaking & allowing loss of suction. I ordered a merc intake hose & will leave that adapter out & try it again.
#16
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The seapump is used primarily for cooling when the boat is idling or moving slow. At planing speeds water is forced throught the system by the movement of the boat. It sounds like a bad seapump to me.