Hobbs Switch

[Roger]

Thanks Tony

However that's not it. That pic looks more like a stall warning switch.

[Roger]

my broken part

Sorry I couldn't help. Good luck finding your part.

[Ernie Martin]

Mine failed on my 337G and I replaced it with a HONEYWELL S&C - 311SM703-T - MICRO SWITCH, which can be bought for under $7 at:

http://www.newark.com/honeywell-s-c/...pdt/dp/78K5282

It required some -- but minimal -- adjustment (cutting part of the long lever, I think).

Ernie

[Roger]

Thanks Ernie - I ordered one today

[Ernie Martin]

Roger:

I looked today at the airplane and in my 337G the adjustment was to cut the lever to the proper size and then glue/solder near the cut end a dime-size disk we made from aluminum.

If you need to fly before you fix it, just connect the two leads together without the switch; in that configuration, the Hobbs runs anytime the master is on rather than at speeds over ~ 40 MPH (when the airflow pushes against the disk to close the switch circuit).

Ernie