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#1
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Prop Help
I have a 1986 V-20 Fisherman. It was originally equipped with an OMC Seadrive. A previous owner removed the powerhead and lower unit but retained the bracket and tilting mechanism. A tapered wedge was then fabricated out of what appears to be marine grade plywood & fiberglass. This serves as the mounting plate for a 2003 Johnson 115 HP 4 Stroke. the best I can figure the anti ventilation plate is 2-3 inches above the keel. My WOT is about 5700 rpm and max speed is 31-32 MPH by GPS. The only markings on the prop look to be 21R. I measured the dia. at 13". Any ideas on how to increase top end and have a cruising speed around 30 MPH would be a big help. As a side note this fall I am removing the OMC stuff and will be installing an aluminum bracket that will move the motor back about 4 inches and maintaining the 2-3 inches above the keel.IMG_2010_exposure.jpg
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#2
08-14-2016, 09:33 PM
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Most v's only hit 28 or so wide open with a 115hp, I would say you're propped pretty good, and should consider yourself lucky to break 30 at full throttle. You can try a 4 blade prop, nut with a 115, you need to be shooting for a 22 mph or so cruise speed.
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2011 SUNDANCE B20CCR SKIFF, 2011 YAMAHA 90HP 4 STROKE, 2011 KARAVAN SINGLE AXLE ALUMINUM TRAILER, LOWRANCE ELITE-7 HDI, MINN KOTA RIPTIDE TROLLING MOTOR 2000CC HYDRA-SPORT 225+HP EVINRUDE SOLD  AND THE PINK JEEP!!!! R.I.P. http://www.wellcraftv20.com/communit...ad.php?t=11664 
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#3
08-15-2016, 08:10 AM
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I'm with Ferm, sounds like you're set up about as good as you could expect to be.
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1985 Wellcraft V-20, Evinrude ETEC 150: SOLD 1979 Marine Trader 44, twin Ford Lehman 120s 2006 Panga 14, Tohatsu 20
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#4
08-15-2016, 11:31 AM
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ANYTHING in the 30's is crazy fast for a 115 engine.
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1987 V20 w/1987 150HP Yamaha on a Shoreland'r Trailer 1978 16.5 Airslot w/1996 120HP Force on a Four Winns trailer 1996 V21 w/1993 200HP Mercury on a Shoreline Trailer All towed by a 5.7L Hemi Durango. If God didn't have a purpose for us we wouldn't be here, so Live simply, Love generously, Care deeply, Speak kindly. (Leave the rest to God)  Silence, in the face of evil, is itself evil. Not to speak is to speak, not to act is to act. God will not hold us guiltless.
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