Does anyone have suggestions on spark plugs for a 1990 Force 120? When I bought the boat, they had L76V Champions in it. The book said I should use UL18Y Champions, Prestolite system... unless it is a Thuderbolt system which uses the L76Y.<br /><br />I have been having some major fouling problems which I think I fixed (idle mixture screw was backed out 3 full turns), but want to start out with the correct plugs.
