I installed a new fuel pump and cleaned/stalled gaskets and low speed jet in a fellows 9.8 Nissan 4 stroke yesterday. The motor is on his pontoon boat and was running pretty good. I mentioned to him that his oil level was low and he should check it. He called me back later and said it ran well at low speed but was a little rough at higher rpms. He decided to check the oil, found it low and added most of a quart of oil. Then he said it wouldn't restart. I have enough sense to rebuild the carb but I don't pretend to know much about 4 strokes. Could adding too much oil keep it from starting? I went through 8-10 start cycles before I left and the owner hooked up the controls and drove all over the lake before adding the oil so, it was starting well before.
If it can be overfilled, what should I do to help him out?
If it can be overfilled, what should I do to help him out?