I've just installed, a new marine long block in my 1989 19ft seaswirl runabout. The old engine wasn't winterized properly, and cracked the block/heads/exhaust manifolds. I went through the engine top to bottom, checking the head bolts torque, main, and connecting rod bearing clearance.<br />I installed all of the old accessories..intake,carb,alt,starter,waterpump,power steering pump, etc.<br />Broke it in on the muffs with about 20 mins of run time @2300 rpm. Running pretty good after timing was set right. Good oil pressure at all times.<br />Took it out on the lake last night for the first time, and brought it up on plane as quick as I could. Then continued to vary the RPMs and not run it at any higher than 3/4 throttle. Did this for about 2 hrs, I will continue to do this until break in period is over.<br />(about 20 hrs) <br />I did briefly hit the throttle hard and noticed it would not come up above 3200 RPMs. Any Ideas??
