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#11
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not sure on price but to up the power is it just a carb change and possibly reeds? or much more involved. would be a sleeper if easy to modify
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1986 V20 96 225 rude on factory bracket 
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#12
04-18-2013, 03:37 PM
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Merc's were marked 1150's... Mariners were marked 115's. I've had both a 90hp and a 115 hp and both engines purred. (I still have the 115) They have a dinstinctive sound, and as I've said before they have awesome torque at the prop.
And for those that don't know, they have no separate head. The head is part of the block. It's all one piece. If you have to service the pistons or rods it's thru the bottom. Wierd, but very efficient and weight saving.
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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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#13
04-18-2013, 08:53 PM
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I believe they made a 150 tower of power early on back before the V-6's came out. And being an inline 6 crossflow, they are very torquey. Haven't really messed with them much, but I know they are light and there only real downfall was they don't rev out that high.
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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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#14
04-18-2013, 09:13 PM
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there is pretty much nothing you can do cheaply to up the power on these... in fact you actually have to detune em a little if you want em to last... they were built for way better gas than we have today so factory spec timing is a little too aggressive for today's fuel.
they are still fine engines but you can't just swap a few parts to make more power..... ALSO parts are NOT easy to come by and many parts just aren't available for em anymore.
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#16
04-18-2013, 10:36 PM
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that's what I have on mine.... haven't tested top speed yet but jumps on plane almost instantly
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#17
04-18-2013, 10:56 PM
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Remember these are rated at the powerhead, in 1985 the hp ratings were at the prop, about a 15% hp difference.
The towers of power came out in 90-115-125-135-140-150. They are great motors and not bad on fuel either. Making a lower hp model a higher hp model is tough, differences in carbs, intake, porting and exhaust. These can be found fairly easily, I know 2 guys that have about 20 top's around there shops. They run crazy good, mass quantities of torque out of the hole!!! A single 140 or 150 would work good on a V -20. But a pair of 150's would be crazy SWEET!!! 
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 88 V-20200 G2
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