n36511
Regular Contributor
"I have a houseboat with twin
"I have a houseboat with twin 145a's and 280 outdrives. On the port engine the RPM raises and lowers without input from the throttle except at idle. When I throttle up to anything above 1500rpm and leave the throttle alone, the rpm will run level then drop for a second and run back up. This weekend I was at 2300 RPM and it would run for a while then drop down quickly to around 1500rpm for a second or so and then back up to 2300rpm. I can here the engine changing RPM so I know it is not instrumentation. I have recently had a tune up and changed the fuel water seperator. Both engines are fed off of one tank and one fuel filter and the other engine does not experience this issue so I feel confident that it is not a fuel quality issue. could this be fuel starvation? This engine is the farthest one away from the fuel tank. Any ideas on how to troubleshoot?
Thanks,
Scott"
"I have a houseboat with twin 145a's and 280 outdrives. On the port engine the RPM raises and lowers without input from the throttle except at idle. When I throttle up to anything above 1500rpm and leave the throttle alone, the rpm will run level then drop for a second and run back up. This weekend I was at 2300 RPM and it would run for a while then drop down quickly to around 1500rpm for a second or so and then back up to 2300rpm. I can here the engine changing RPM so I know it is not instrumentation. I have recently had a tune up and changed the fuel water seperator. Both engines are fed off of one tank and one fuel filter and the other engine does not experience this issue so I feel confident that it is not a fuel quality issue. could this be fuel starvation? This engine is the farthest one away from the fuel tank. Any ideas on how to troubleshoot?
Thanks,
Scott"