Join Date: Feb 2013
Thanked 0 Times in 0 Posts
Rep Power: 0
Inboard Diesel Noob, Impeller question
Picked up my boat a few weeks ago, have it on the driveway as it needs a bit of work. 1971 Pearson Wanderer with a Universal M3-20 3 cyl 18 hp diesel. I've never owned an inboard, never mind a diesel before. My guess is the motor hasn't been run for anywhere between 3 and 6 years. I managed to get it running, so that's a big relief to me.
I'm just surprised at how little an impeller can draw. I had assumed that I would be able to get it draw water out of a bucket. It pretty much didn't at all and needed to be primed. I'm not sure this will be a problem once the boat is in the water. The waterpump is below the water line so it should self prime. Is this normal?
Also, it seemed that it would stop drawing after a few minutes. Now, I'm not sure if I accidentally let it draw some air. But, is that the case? If it sucks air, then it can vapor lock and burn up the impeller?