Reply To: Galloping Fastwin

[need2fish]

Galloping is what we call surging. in my experience, is a symptom of high altitude fuel starvation. It’s also a symptom of running in a tank where the engine is inhaling its own exhaust.

First of all , any elevation over 1,000 feet is considered high altitude… which means you have to richen both low and high speed mixes. I’m at 1,200 ft and have to run my smaller motors just a touch rich.

I confirm better results are obtained by testing on the water. When you do, bring along a spritzer with premix in it to shoot down the carb throat when the surging starts. If the rpms even out for a few seconds, that is proof of fuel starvation.