hey all i just bought a 211 regatta 21 ft v6 mercruiser inboard out board, i had to have the freeze plug replaced and patched the crack on the manifold. took it to the lake to day to try it out after haven this fixed started up it was ideling real low took it out of the dock an my granddad full throttle it when whe got out there an we went a good bit then all of a sudden it was wanting to die when u have it full throttle then it did die. put it back in nutral and started it back up it will run when u dont full throttle it just half or lil less then half, got it back to the dock adjusted the idle so it was sped up a little but didnt get to take it back out grand dad affraid we would get stuck on the lake. the boat repair guy fixed the freeze plug an crack and said all was good wasnt leaking water and the oil was free of water, i dont know what it could be like i said new to a boat, just picked this one up for 1000, cause the inside needs to be redone cause of rotten seats and cracked seats. sorry for a long post just want to get this boat running right so i can get out on the lake.