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I have a 1999 Eliminator 280 eagle with a merc 502/Bravo 1 drive that has a 4 blade 24P S.S. prop. that tops out at about 4000 rpm @ WOT and about 4200 if trimmed. At this rpm, boat speed is about 48-52mph. I've check the throttle cable/linkages and found no binding (Butterfly flaps open full as expected). Does anybody know if this rpm is all I should be expecting from this set up? Past 454's that I've driven have topped out around 4800-5000 rpm.
Thanks
Something sounds wrong. I have a 28 eagle xp with a 496 HO Bravo 1x and a 22p 4 blade. My boat runs 65mph at 5100 rpm's.
After running the prop slip for your boat assuming you have a 1.5 gearset I input: 24pitch, 4200rpm's, 52mph, and got 18% slip.
You may wany to either have the 24pitch labbed or go down to a 22, in order to let the motor rev a bit more. BTW, when is the last time the boat had a full tune. You'd be suprised what a difference a propper tune up (plugs, wires, timing ,ect...) can do for performance. Always check the basics first.
Darrell.
Assuming engine is stock...............and before seeing if engine issues.....
Stock 502MPI should be propped for 5000-5100rpm at WOT. HP500 I believe is 5200rpm.
First thing to do is call Eliminator and see what prop they put on these when new.
What is your outdrive's gear ratio ?
While waiting for these answers check to make sure your tabs are pulling all the way back up and outdrive trim is working correctly.
yes