prop size 1 1/2 in smaller than original, been whittled on..

[tallcar]

this is the original prop for this motor '56 MercElectric Mark 25E part # 48 23647A1, embossed in prop, problem is prop is supposed to be 11 inches in diameter, but measures only 9 3/8 inches.... could this be why boat will not reach charted speeds, it is currently running 10 - 15 mph slower than called for in specs?

 

[ob]

Re: prop size 1 1/2 in smaller than original, been whittled on..

most definately. It simply is'nt throwing the volume of water it once did.That coupled with load factors all play a part

 

[Reel Appeal]

Re: prop size 1 1/2 in smaller than original, been whittled on..

Hi,<br /> How many horsepower is your motor?Take a tape measure from the center of the prop shaft to the bottom(underneath) of the cavitation plate.Whatever this measurement is multiply by 2,then subtract 1/4"inch.This is the largest prop diameter your motor should accommodate.Hope this helps...

 

[tallcar]

Re: prop size 1 1/2 in smaller than original, been whittled on..

manual, prop chart, and parts list all say this motor to ship originally with an 11 inch prop, the prop i have matches their part number, and yes an 11 incher will fit, already checked it, but thanks for replying

 

[tallcar]

Re: prop size 1 1/2 in smaller than original, been whittled on..

sorry reel missed your question the first time...it is stated as a 25E, but actually it is rated at just over 20 pony's