motor issues, carbs dirty maybe?

[Bushwacker]

A rubber hose on a barbed fitting w/o a clamp is asking for trouble because there's nothing to keep that hose from coming off in rough seas! I'd change that entire pickup assembly to a solid 3/8 pipe and make sure there is no smaller diameter in any of the elbows or fittings! 5/16" is too small for a V-6 and could cause you to burn a piston at WOT. The dealer that used to service my old V-4 said they had traced repetitive power head failures on a V-6 to that type of restriction - the lines were 3/8 but there was a restriction in a 90 degree elbow! I think the pickup in my OEM tank is a 1/2" diameter pipe! The V-6's on a 20 are more vulnerable to this problem than the V-4's because you have so much power that you're less likely to notice a small drop in power due to a lean cylinder!