engine surges with gv-1 on

[rcflier1]

ys56 and gv-1 governor. with the gov off all is fine and the engine runs smooth on a v curve. when I turn on the governor the engine starts surging. I have 2 speeds programed in and both have the issue,.any ideas?

[mdu6]

Electronic engine governing is a lot more sensitive to different parameters then a 'loosely' governs engine with a preset power setting (V-curve).

That being said, governors will get throne off by slow/irregular throttle response - most often a rich mid range will make it difficult to govern the engine.

Futaba in the GV-1 manual goes to that amont of details about throttle response:

The use of a tuned pipe type silencer may cause the engine throttle response to be substantially different from that with a normal muffler. Adjust the needle (and pipe length) so that engine speed changes are proportional to the throttle opening. If the engine speed does not change linearly, the governor will not perform satisfactorily with a muf- fler or a pipe that does not allow the carburetion to be linear.

There are also a couple of parameters in the GV-1 hidden menu that can help - like GLmt -

Look at this video - it talks about overspeeding Gas engines/GV-1 settings

Futaba GV-1 Governor Hidden Menu Setup (3 min 22 sec)

[rcflier1]

hmmmm, will check it out, it does have the hatori pipe, and the midrange and high are a little rich

[acrow]

To ensure that the sensor isn't faulty, have you used this sensor on another governor, or another sensor with this GV1? A bad sensor won't help!

Regards

Acrow

[Lighty]

sounds like its too rich, gov will struggle. It'll be like gas on gas off gas and so on.

[rcflier1]

that's what it sounds like. on-off. it worked fine before an engine swap

[marc8090]

Futaba governors will do that when the engine is too rich.

[rcflier1]

YES! leaned the hover/.midrange needle. now runs smooth.............thanks