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1984 70 horse Yamaha overheating ?
My outboard overheat alarm goes off when backtrolling for a short
period of time. After 5 mins or so it runs fine again and the alarm
never sounds when running at normal speeds. Where should I start a new
water pump the thermostat or a clogged passige way. Im in a bad spot as
salmon season opens tomorrow. Even if I can get the parts today is
changeing the water pump to much to tackle for an average joe at home ?
Any advise or help I would apreciate as Im obligated to friends and a
10 year old boy to fish tomorrow morning. |
oneslikfish
Jul 15
2006
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| Overheating at idle is often the water pump. It may be wearing out and not
delivering enough water at low speed. When you go faster the rpm make up
for the worn out water pump. "oneslikfish" <camazica@yahoo.com> wrote in message |
James
Jul 16
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| On a 22 year old Yamaha, especially if used in saltwater, clogged
passageways are usually associated with high speed overheat problems, not at
idle. Most likely a worn water pump assembly and a corroded thermostat are
the causes and should be replaced first. Clean out any debris or corrosion
in the thermostat cavity and look for "eaten away" areas on the aluminum
castings. Replace the waterpump as a complete kit, not just the impeller.
There is also a possibility of a head gasket leak on a motor that old but
don't try to take things apart that you don't have to at the moment. Be sure to let us know what fixes the problem Bill Grannis
service manager |
Billgran
Jul 16
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