From email@example.com@21:1/5 to All on Fri May 20 16:23:11 2022
Yamaha outboard motor (9.9 HP/ 7.3 kW, T9.9EXHP, 6G8 UL 784628, 1991)
starts immediately and runs well when cold. When warm, misfires are
If stopped, deliberately or by the misfiring, after running for about
20+ minutes, the motor won't start again until cooled.
The motor has an electronic ignition. From my minimal experience and reasoning, the misfiring is more likely from faulty ignition than from
fuel supply. The service manual shows these parts in the ignition.