Viscount
Member
I have 2 x AD31b - 290DPs. Earlier this year, one has developed a lack of power to the extent that when warmed up will not exceed 1,200RPM under load. Air and fuel filters all changed with no dice. Boat been out of water, all the usual done but also drives removed and checked over, no issues. Will now try to post a video (please make sure sound is on) demonstrating what happens when throttle applied in gear tied up at pontoon.