Hey everybody,
2002 Mercruiser 4.3MPI sn/0M325971
260 hours
In a 2002 Brant 188 18 foot bowrider.
Recent history:
In early July this year Started and ran good first run of the season. Could hit top RPM and was smooth operating at any rpm. Ran it for 40 minutes, was low on fuel so ended that day and topped off with non-ethanol fuel later, from same place as what was in it.
I added Stabil later next day in proper amount.
Next run was 2 weeks later, started ok, ran ok, water was a little choppy maybe. Stopped for a bit out on the water, had 2 passengers, started engine and took off off ok, set it to 3400 rpm for a nice cruise and it started dropping RPM until it got to 2600, then tried to surge back up but hit maybe 3200rpm then came right back down to 2400-2600 each time, then would tr to go up again. I trimmed down and tried to find a spot on the throttle that could stay at 2400-2600, so still surging we went back to the dock at the lower speed. I was afraid it was going to die a couple of times but it always went back to 2400-2600 or so but it was never a steady run, surging whole time. Once we got to the dock at idle it was fine and did not notice any surging. We had to putt around for a while until our turn at the ramp, acted normal at the super low speeds.
I dumped the fuel from the filter into glass jar and it was clean, let it sit and no sediment or any contaminants showed after several hours, so confident it only has good fuel in it. I put in a new fuel filter but have not run it since then.
When it started cutting out I had just planed out and was settling in for a 3400-3600rpm cruise. It was ok for about 30 seconds then the surging started. The bow was up some so I leveled out and it seemed a little better, the surging seemed to not be as drastic. I opened the gascap, no hissing. , that is all the diagnostics I have done except for the filter inspection.
Thanks for reading....Send me a bill... !!!
2002 Mercruiser 4.3MPI sn/0M325971
260 hours
In a 2002 Brant 188 18 foot bowrider.
Recent history:
In early July this year Started and ran good first run of the season. Could hit top RPM and was smooth operating at any rpm. Ran it for 40 minutes, was low on fuel so ended that day and topped off with non-ethanol fuel later, from same place as what was in it.
I added Stabil later next day in proper amount.
Next run was 2 weeks later, started ok, ran ok, water was a little choppy maybe. Stopped for a bit out on the water, had 2 passengers, started engine and took off off ok, set it to 3400 rpm for a nice cruise and it started dropping RPM until it got to 2600, then tried to surge back up but hit maybe 3200rpm then came right back down to 2400-2600 each time, then would tr to go up again. I trimmed down and tried to find a spot on the throttle that could stay at 2400-2600, so still surging we went back to the dock at the lower speed. I was afraid it was going to die a couple of times but it always went back to 2400-2600 or so but it was never a steady run, surging whole time. Once we got to the dock at idle it was fine and did not notice any surging. We had to putt around for a while until our turn at the ramp, acted normal at the super low speeds.
I dumped the fuel from the filter into glass jar and it was clean, let it sit and no sediment or any contaminants showed after several hours, so confident it only has good fuel in it. I put in a new fuel filter but have not run it since then.
When it started cutting out I had just planed out and was settling in for a 3400-3600rpm cruise. It was ok for about 30 seconds then the surging started. The bow was up some so I leveled out and it seemed a little better, the surging seemed to not be as drastic. I opened the gascap, no hissing. , that is all the diagnostics I have done except for the filter inspection.
Thanks for reading....Send me a bill... !!!
