Fuel Link Problems on 260 Mercruiser

[mmarston]

Hello,

Our Sea Ray is recently having an issue at about 2000 rpms it starts to cut out and bog down. We have a rebuilt 260 Mercrusier with only a few hundred hours. It starts, idles and under 1800 purrs great - no smoke, abnormal noise, etc. But when we increase the rpms the trouble starts and it nearly dies - cuts out, sounds like a fuel problem and Here is what we have done

1. Replaced Fuel Filter
2. Cleaned internal fuel tank filter
3. today we are replacing spark plugs

 

[Searay Jim]

Does it rev through that RPM range at idle OK but bogs/sputters under a load? If so, I think you're on the right track looking at a fuel starvation problem. How's the water separator? If that's changed, or good, since it's rebuilt, I'd check fuel pressure.

 

[Bucit]

If it happens at that RPM or hinger in neutral and in gear you may have water in your fuel. I had this problem with an outboard a few years ago.

 

[mmarston]

If it happens at that RPM or hinger in neutral and in gear you may have water in your fuel. I had this problem with an outboard a few years ago.

Thanks - I think you are right - we changed the water separator and just put an additive in the gas to "dry" the fuel. Or - did you have to drain the tank?