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2005 Suzuki 140 hp 4 stroke overheating at highspeed only

Victor long

New member
Hi can anyone help Please? I have a Suzuki outboard 140 4stroke .On idle the temp is fine 174 deg but pee fluctuates slightly but ok . after about a mile at over 4000rpm the pee is weak, then the engine cuts out and buzzer and red light comes on .the water pump impeller ,thermostat and zincs in the engine have been changed , the boat was fine 3 months ago but been unused for last 3 months till now
Thank you for your help tel 239 558 5183 :confused:
 
Re: 2005 Suzuki 140 4 stroke overheating at highspeed only

hi Have changed the presure valve the mid gaskit water pump the rubber flapper . Tharashed the guts out of it and buzzer and red light dont come on But Pee is weak at hi revs used to be strong
 
Re: 2005 Suzuki 140 4 stroke overheating at highspeed only

either you did not use a new water pump housing
clogged t-stat
or clogged pee hole
 
Re: 2005 Suzuki 140 4 stroke overheating at highspeed only

If this engine is working in salt water you must to open and clean the cylinder head of the engine...
 
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