"I wonder if you can help? My
"I wonder if you can help? My 1982 volvo AQ125 will not rev above 2900 rpm under load. It revs freely to over 5000 rpm when the boat is in neutral. A major tune up and check of all functions has just been completed with no resolution to this problem. When running under load, engine hatch open and spark arrester removed, gas sprays out of the carburetor in to the air, when attempting to rev above 2900 rpm. This also fouls sparkplugs on cylinders 2 and 3, but not 1 and 4. We've had our mechanic on board and he can't find the problem. Any ideas?"