Check the timing also.
Bill

"Larry W4CSC" wrote in message
...
Fuel starvation. Filter plugged, pinched hose, tank screen clogged,
air leaking into suction side of the line before the pump, fuel valve
closed partially when the wife hit it putting her beach bag in the
bilge. It'll run fast with no load because it doesn't use enough
fuel with no load.

On Mon, 18 Aug 2003 08:10:30 -0400, John M Murphy
wrote:

I have a 28 foot walk-around with dual chevy 350 inboards, velvet 71-c
transmissions and 16x18 props. Loaded weight is probably about 12,000.

The port engine will rev all the way up to 4200/4400 rpm at WOT and will
cruise in the 3200-3600 range. The starboard engine maxes out at 2800
rpm and won't go beyond that under load.

Both engines rev-up equally in neutral and compression tests were fine.
Had the boat hauled and the bottom and running gear are clean.

Any thoughts as to where to look for the problem?


Larry W4CSC

Maybe we could get the power grid fixed if every politician
regulating the power companies wasn't on their payrolls.