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learjet031

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  1. Help! 2006 signature with 5.0 mercruiser bravo III with 500 hours. Overheats above 3000 rpm, I have new risers and manifolds, new impeller. I swapped thermostat housings left to right which included thermostat, temperature sensor and temp switch. Externally inspected transom hose and it looks ok. Please, any ideas??? Thanks Jonathan
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