"My 470 has started to make a
"My 470 has started to make a noise, nothing serious I think but wondering if anyone out there has the same issue. Only change to the engine or drive before the noise showed up was a larger (14.5 inch prop 19 pitch vs. the former 14/19).
The engine runs fine, temp stays at around 140 - 145 degrees (even with the 3 inch heat exchanger) and oil pressure is good. After crusiing for a while at around 3600-3800 rpm the engine noise changes, just slightly... makes a little lower pitch sound. The temp and oil etc stay the same and the boat runs fine. Just the noise, or harmonics change... one fellow that I had onboard told me he thought it could be the venturi/fuel icing in the carb?
Still looking for a solution to the hard start when engine is hot problem. The boat is all tuned up and just have to look at it when it is cold and it fires right up, but when hot I have to crank the starter for 8-10 seconds before the engine kicks over. Once running it is fine. I have new plugs, wires, everything all tuned. It is a two barrel carb, would a four barrel halp?"
"My 470 has started to make a noise, nothing serious I think but wondering if anyone out there has the same issue. Only change to the engine or drive before the noise showed up was a larger (14.5 inch prop 19 pitch vs. the former 14/19).
The engine runs fine, temp stays at around 140 - 145 degrees (even with the 3 inch heat exchanger) and oil pressure is good. After crusiing for a while at around 3600-3800 rpm the engine noise changes, just slightly... makes a little lower pitch sound. The temp and oil etc stay the same and the boat runs fine. Just the noise, or harmonics change... one fellow that I had onboard told me he thought it could be the venturi/fuel icing in the carb?
Still looking for a solution to the hard start when engine is hot problem. The boat is all tuned up and just have to look at it when it is cold and it fires right up, but when hot I have to crank the starter for 8-10 seconds before the engine kicks over. Once running it is fine. I have new plugs, wires, everything all tuned. It is a two barrel carb, would a four barrel halp?"