I'm not sure what i did but i was running copper line for an oil pressure guage and i think i did something to the govenor. at idle when im running in water and hit an object the motor starts starts "loping" or "hunting". i can take the motor out of the water and put it back in and it goes back to normal. i've screwed up the gov but not sur about setting one. btw i ran the copper line right beside the gov to carb linkage.

Which motor?

b&s 16hp vanguard