Hello to all! 1st time poster but avid reader.
Now I have a query.
I just recently bought the boat. It has a 5.7 mercruiser with an alpha 1 gen 2 drive. Ratio is 1.47.
Here is the problem. I ran a high five 14.5x21 pitch prop and couldn't reach wot.
Then tried a 14x21 pitch 3 blade. No hole shot and takes forever to get on plane.
Next I tried a 14.5x 19 pitch 4 blade. Hole shot is decent and wot at 4600rpm with a speed ( gps) of 43 mph.
I was led to believe that the boat should do about 50mph. (Dreaming).
The problem is as soon as I trim out 1/4 way after plane, the prop grabs air and the engine goes free rev. It doesn't want to trim out therefore I have to leave trim all the way down.
Is this normal?
Now I have a query.
I just recently bought the boat. It has a 5.7 mercruiser with an alpha 1 gen 2 drive. Ratio is 1.47.
Here is the problem. I ran a high five 14.5x21 pitch prop and couldn't reach wot.
Then tried a 14x21 pitch 3 blade. No hole shot and takes forever to get on plane.
Next I tried a 14.5x 19 pitch 4 blade. Hole shot is decent and wot at 4600rpm with a speed ( gps) of 43 mph.
I was led to believe that the boat should do about 50mph. (Dreaming).
The problem is as soon as I trim out 1/4 way after plane, the prop grabs air and the engine goes free rev. It doesn't want to trim out therefore I have to leave trim all the way down.
Is this normal?