Honda BF5 Runs for 30 minutes only....

sloshed

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May 7, 2013
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My Outboard is a Honda 5hp.

I've had this problem for some time now and am desperate to resolve before my wife abandons my hobby !:facepalm:

The engine starts of the first pull every time. It then runs for almost 30 mins and then cuts out and will not restart for another half an hour. I have become quite accomplished at emergency mooring ! (River/Lake Cruising)

Despite not being mechanical, with the guidance of somebody whi is..I've given it a basic service, changing the impeller ( it was chewed up so I had hoped that would solve the problem ), the oil, gear oil etc.... I've take n the themostat out and checked it in a pan of water and it appears to open fine in boiling water.

Does any body have any thoughts as to what the matter might be ? The only clue is perhaps in the fact that it is consistent in running for 30 minutes....

Many thanks for any assistance.
 
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