water pressure problem
so the problem is the boat will have 20lbs of pressure for the first 1/2 mile the boat is on plane , then the pressure drops slowly from 20 to 0 lbs in then next 600ft . then the temp goes from 140 to 195 and sounds the alarm ,after you go back to idle the temp will slowly go back to 140
we have no leaks replaced the impeller cleaned the strainer replaced the thermostat checked the block water pump checked the oil cooler for blockage checked the impeller housing for cracks no water in oil no visable hose kinks or blisters the sea pump is moving water because the water is swirling in the strainer and spitting out the exhaust IDEAS ? |
Check for belt slippige so
Something could've getting warmed up and seizing or. Belt heats up loosens up enough to start slipping. Especially a v belt setup , check width on v belt if equipped ? |
Do you have a fresh water flush system? If so, does it have a ball valve or check-ball in that system at all? There could be debris impeding flow at that valve if so; as I have seen that happen on more than a few boats.
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Did you replace impeller and housing at the same time or just impeller? Replacing in a pair yields much better results, use Merc brand also.
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I had the same issue.
After chasing my tail for hours, a friend looked at the housing. Changed it and this were right again. Ken |
Originally Posted by ROB FREEMAN
(Post 4444973)
Check for belt slippige so
Something could've getting warmed up and seizing or. Belt heats up loosens up enough to start slipping. Especially a v belt setup , check width on v belt if equipped ? thanks for the idea |
Originally Posted by Sydwayz
(Post 4444982)
Do you have a fresh water flush system? If so, does it have a ball valve or check-ball in that system at all? There could be debris impeding flow at that valve if so; as I have seen that happen on more than a few boats.
thanks for idea |
Originally Posted by VoodooRob
(Post 4444984)
Did you replace impeller and housing at the same time or just impeller? Replacing in a pair yields much better results, use Merc brand also.
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Originally Posted by minxguy
(Post 4445002)
I had the same issue.
After chasing my tail for hours, a friend looked at the housing. Changed it and this were right again. Ken I will replace the housing this week |
Replaced the housing and another new impeller . Changed another thermostat , changed the inlet hose to the sea strainer and sea pump . Changed seals in the impeller shaft also . Tightness checked on the belt also
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