kojak41

[8D]I have both a Magnum .52 and .70 FS where the control arm that connects the throttle to the speed control servo is held in place by a small set screw that has loosened allowing the arm to move without reliabily rotating the throttle barrel and resulting in inconsistant idle adjustments. I don't seem to have an allen wrench the right size to tighten these screws. I have checked and Magnum does not include a correct sized allen wrench with their engines and does not indicate the right size. I assume that it is metric sized but the metric set of allen wrenches I have does not include a wrench small enough to fit. Does anyone know the right size wrench to use and where I can buy one?

Thanks for any help!

Mike H.

Gregor32

My Feedback: (1)

Im not at home at the moment but im pretty sure its a 1.5mm hex key you need and the set screw is an m3 thread. ill check tonight. Greg

DarZeelon

Mike,


All screws and bolts on OS engines and all their clones, like your Magnum (with the exception of the prop retention and glow-plug, which are Imperial) are metric.

The Allen grub-screws in the throttle arm, typically requires a 1.5 mm, or 2.0 mm Allen wrench; like the one in many wheel retention grub-screws.

kojak41

I found a 1.5 metric and it works. Thanks!

Mike H.

DarZeelon

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