Recent content by PaulBF150

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    Honda BF150 Overheating

    Today I closed off the Pressure Relief valve, so no water is return to the sea! Not getting Overheating alarm even under extreme acceleration. Also reconfigured the 2 thermostats so they stay open. Going to replace them with the proper ones 50C and 60C. See what happens.
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    Honda BF150 Overheating

    WoW looks like more homework! Answers inserted into your text in ( ) What cleaner did you use (not sure now) What concentration of HCL? (Used Muriatic Acid, and just dumped say a cup full into 5 gallons of water) Was it squeaky clean looking when done? (No, still corroded looking). I guess...
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    Honda BF150 Overheating

    thanks Matt, Actually, did that when I broke down the engine. With lower end off hooked up sump pump to the water tube and pump in barrel and cycled the cleaner for days. Did wash out about tablespoon amount in each flush. Also did go with adding some HCL in water mix.
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    Honda BF150 Overheating

    Here is the full version of my problem and what was doen to date.... I have read through many of the threads on this topic and concluded they are similar but not hitting the target. So, writing this new thread. History: Boat is 25ft Grady White with Twin BF150’s. They have about 1,000 hrs...
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    Honda BF150 Overheating

    I had to remove the engine head from the engine block. The Head was cleaned with solvent and compressed air. The cylinder jugs I cleaned with brass brushes. I would say at least a cup full of corrosion. Some port on head were clogged. And as I mentioned around cylinders 3 and 4 were much loose...
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    Honda BF150 Overheating

    Seeking advice regarding subject problem. Thus far; new water pump, new thermostats (2), new Temp Sensors (4), new pressure relief valve, cleaned internal cylinder block and heads of corrosion. All resulting with same issue, under load especially attempting to get onto plane throws temp light...
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