1977 35 hp johnson water pump

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buckcrickdiver

Recruit
Joined
May 14, 2010
Messages
3
alright im new at this boating thing i cant come to comprehend the water pump on my engine every time it warms up the pump completly stops workin when it cold it spits and sputters but the impeller looks fairly good? if there is a leak at the exhaust cover would this be a cause?
 
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R.Johnson

Rear Admiral
Joined
Sep 24, 2003
Messages
4,446
Re: 1977 35 hp johnson water pump

A pump that look's fairly good could well be wore out.
 
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oldgradywhite

Petty Officer 1st Class
Joined
Sep 7, 2007
Messages
232
Re: 1977 35 hp johnson water pump

The water pump, t stats, and pop it valve a cheap to replace compaired to wiped out power head I think less then $100 here on iboats.
 
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buckcrickdiver

Recruit
Joined
May 14, 2010
Messages
3
Re: 1977 35 hp johnson water pump

your talkin bout thermostats where are they located and your right im gonna replace the water pump but why would it change during temp change wouldnt a temp change make the rubber impeller expand and create a tighter seal?
 
kenmyfam

kenmyfam

Supreme Mariner
Joined
Aug 10, 2006
Messages
14,398
Re: 1977 35 hp johnson water pump

buckcrickdiver said:
your talkin bout thermostats where are they located and your right im gonna replace the water pump but why would it change during temp change wouldnt a temp change make the rubber impeller expand and create a tighter seal?
Click to expand...

Have you actually inspected the impeller yet ????
 
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