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Honda 5hp (BF5/BF5A) Outboard Cooling Question
I had such a motor for many years. Never failed but yes you should see
cooling water coming out at any RPMs "Heather Wilson" wrote in message m... Hi, We have the above identified outboard (1988 long shaft) on our 21' trailer sailor. Bought 2 years ago from a from a fresh water sailor (lake Ontario), and we sail on the Chesapeake (brackish). We flush the motor after a sail about 50% of the time. We replaced the impeller (disintegrated) last year, and the thermostat this year. Did not note any obstructions in the observable coolant passages. The motor starts on the first pull, and seems to run fine. The problem is that the cooling water indicator port (on the frame) only streams water at ~1000rpm and above; below which it just steams. During a stress test, we found the engine stalled after about 10 minutes of idling (& steaming). Should the indicator port stream water at all rpms? Does the steam indicate a cooling system problem? Any guidance from someone with similar experience would be much appreciated! Thanks. |
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Honda 5hp (BF5/BF5A) Outboard Cooling Question
Hi Guys,
Thanks for all the help! I'd say that you helped us eliminate most of the problems. Thanks! We pulled the lower drive on the outboard today to further investigate the problem. Turns out, there's a rubber cap seal between the output of the water pump and the water tube. We found the seal pushed up on the water tube where it wasn't engaging the top of the water pump housing. During installation, the cap seal is pressed onto the top of the water pump housing, and slides onto the water tub as the lower drive unit is installed. We started it, and now pumps water from the indicator at all RPM! Thanks to everyone for all the help. Hopefully, this will help someone else with a similar problem. "Luc Poulin" wrote in message m... I had such a motor for many years. Never failed but yes you should see cooling water coming out at any RPMs "Heather Wilson" wrote in message m... Hi, We have the above identified outboard (1988 long shaft) on our 21' trailer sailor. Bought 2 years ago from a from a fresh water sailor (lake Ontario), and we sail on the Chesapeake (brackish). We flush the motor after a sail about 50% of the time. We replaced the impeller (disintegrated) last year, and the thermostat this year. Did not note any obstructions in the observable coolant passages. The motor starts on the first pull, and seems to run fine. The problem is that the cooling water indicator port (on the frame) only streams water at ~1000rpm and above; below which it just steams. During a stress test, we found the engine stalled after about 10 minutes of idling (& steaming). Should the indicator port stream water at all rpms? Does the steam indicate a cooling system problem? Any guidance from someone with similar experience would be much appreciated! Thanks. |
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