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15 johnson has water at the tell tale hole but still overhea
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<blockquote data-quote="Pappy" data-source="post: 205409" data-attributes="member: 3278"><p>Try the water pump.......! When you get it apart look at the cup for grooves at the top and the bottom plate for grooves as well. If you can feel the grooves with a fingernail replace the complete pump assembly. Know that's more expensive but alot cheaper than a powerhead!</p><p>You're apparently in salt or brackish water so you may also have the grommets at the top of the water tube melted and blocking flow or corrosion build-up behind them and pushing them shut. The vintage engine you have is prone to this. Would be enough water for the telltale but not able to pump enough volume to cool the engine on plane or higher. You must pull the powerhead to replace those. Not a hard job and all you will need are two grommets and a base gasket. Good time to do the pump and all the fuel lines at the same time.</p></blockquote><p></p>
[QUOTE="Pappy, post: 205409, member: 3278"] Try the water pump.......! When you get it apart look at the cup for grooves at the top and the bottom plate for grooves as well. If you can feel the grooves with a fingernail replace the complete pump assembly. Know that's more expensive but alot cheaper than a powerhead! You're apparently in salt or brackish water so you may also have the grommets at the top of the water tube melted and blocking flow or corrosion build-up behind them and pushing them shut. The vintage engine you have is prone to this. Would be enough water for the telltale but not able to pump enough volume to cool the engine on plane or higher. You must pull the powerhead to replace those. Not a hard job and all you will need are two grommets and a base gasket. Good time to do the pump and all the fuel lines at the same time. [/QUOTE]
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15 johnson has water at the tell tale hole but still overhea
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