installed new propeller
Put a new prop on the boat this morning. She's running better than ever:
Had 15x17 3 blade aluminium was getting these numbers:
WOT: 37mph @4900 rpm
cruise(on plane) 23mph @ 3700rpm
New prop is a Mercury marine Alpha 4, 4 blade aluminium
New numbers are much better and much closer to the manufacturers specs:
WOT: 34mph @ 4500rpm
cruise(on plane) 20mph @ 3200rpm
And she gets on plane much faster and smoother than with the old 3 blade.
These number were tested with 3 ppl on board, full gear, and 1/2 tank of fuel. Also, we left the drive all the way down and trim tabs in the full up position for all the above numbers... Trimmed out a bit we can get an extra 1500 rpm and 3-4mph out of her but no need to push it, she is almost 20 years old...
For those that don't know us:
Bar Hopper is a 1995 2400scr with a 5.0 Mercruiser with an alpha one drive. She always carries a full fresh water tank(13 gal), 1/2 full(7 gal) holding tank, we carry a grill, 2 anchors, fenders, and gear for the sandbar. So she is usually "Pretty Heavy".
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