Hello i recently bought a boat that has the Merc 1150 thunderbolt on it. Issue i am having is it runs awesome for about 10 min then when going at WOT it is surging from 4500 to 2000 and back up then just looses all power other then a trolling speed then i can hit the power again and it will get...
I have a busted upper gear case 981112 is the model number on it and was wonder if a model number 982461 upper gear case would fit and turn the right direction. Both are 800 series upper drives. Thanks. Engine is OMC 185 labeled via Valve covers. 78 Galaxie is the boat.