This initial 5 hours of operation is the critical period. 1-1 Breaking-in period is initial 5 hours.
It seems to me that it could be a crack in the head "assembly" but I find that difficult to accept or the motor itself would not idle & run as well as it does. It doesn't spurt out very far but then again, the DT4 only has a small impeller in the pump so I wouldn't expect a gusher.Īll water passages are clear - proven by using water from a hose and by the fact that it pumps when cool. A power drill on the drive shaft to the pump (when separated from the bottom of the drive housing) lower unit causes the water to bubble out of the pump's outlet. So far I have replaced the water pump impeller, the grommet feeding water to the cooling jacket, the gasket from the power head to the drive shaft housing ( and cleaned out the entire water jacket in the whole process ). This was never a problem before - the motor always pumped water well each and every time I used it. Eventually it just peters out to a wisp of steam - then a quick "kill" of the motor is the order of the day to prevent damage. The problem is that the water coming from the "pee hole" is ok when cold but slowly decreases as the motor warms up. The motor starts easily enough and idles just fine. I am now trying to set it up as an auxiliary on my 14ft Clark as a backup to a 35HP Evinrude.
I have a DT4 that I bought about 12 years ago and it has had little use.