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Volvo 8.1 Missing/Surging


New problem with this boat. After running and feeling good about the temp on the port motor, I noticed a surging or missing on the tach for the starboard motor. Initially at about 3200, so I pulled back to 2000. Seemed to run smooth at 2000, when I attempted to run it up again it began to surge. Fuel starved maybe? Not sure, not familiar with the MPI motors. When I got back to the dock and they cooled down I changed the fuel filter, hoping to find some crud in that, nothing. Ran it again, idled smooth up to about 3K than surged (this was a short no load at the dock test) again seems to run smooth below that RPM?

Thoughts

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