I think the general consensus is that 2 gauge or 1 gauge is fine for a V20/V21 rewire. I ran 2/0 guage, (.365") for my primary wires to and from the batteries, and I know a lot of others have done the same. Like Bradford, I went with a 1-both-2-off switch. Nice, safe, simple and effective.
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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.
Last edited by Destroyer; 06-07-2014 at 04:04 PM.
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