I have a 1969 20 hp that I am working on for my father. It was running very poorly (wouldn't take throttle), so I rebuilt carburetor. It now starts fine, idles ok, but at wot it seems to be at about 75% power.<br /><br />I have no tach, but it seems to be at about 4000 rpms. The boat is a 1649 Grumman jonboat with full plywood floor, 225 lb. operator, full tank and a 1987 25 HP Johnson on the back (didn't want to remove for testing/back up power). The propeller is a 9 1/4 X 12 cupped, so it may be overpropped (2100 ft altitude). My 25 hp makes this boat fly with a 10 X 13 prop, and a 1984 15 hp Evinrude with 9 X 10 prop moves this considerably faster (with same amount of gear in boat).<br /><br />The engine seems to surge slightly at WOT, and when I checked the plugs they were slightly wet with fuel. I was getting a good fat spark (with plugs removed and turning flywheel be hand), and the coils were of the new type (non cracking).<br /><br />Also, when I put finger over plug hole, good compression is indicated, but it seems like I am also getting suction on my finger after the compression stroke. Don't remember this on other outboards.<br /><br />Would faulty reeds account for this suction and the wet plugs?<br /><br />Sorry for long post, any help appreciated.<br /><br />Tom E
