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Old 03-19-2010 | 05:38 PM
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mk1spitfire
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From: south, UNITED KINGDOM
Default RE: Weston Magnum R build

Your engine will be alot free'er after 1st run in. The pinch is tight on 50v1 and 36v1,so i assume the same for 52. Its another debate on how to run it in but basically the quicker the engine can get up to to temperature then the pinch will be less due to expansion and things won't wear out, but bed in! I'm sure instructions will say run rich for 1st tank, or more like 4stroke sound tuning,but its not a ringed engine.
Ohters here can give more tech advice.

What fuel you going to use? Prosynth 10%? Weston say use that because they sell it and thats part of the warranty. My only comment on that is the unknown oil content they refuse to disclose.
I've used it for a season but im convinced the low oil wears things out quicker but performance is good as there is more methonol to burn instead of oil.
I've switched to another synth called propower 18% oil or may try techpower 15% both by model technics. Pro sythn cheaper though.

Watch out for flooding, be prepared to take plug out and turn her over to spit fuel from glow plug hole.

pp7 plug? sometimes 2v gives a better glow for starting.

Your know when its tuned right because it sounds angry. It might pay to get someone to launch it for for first flight until trimmed but after that its very simple to launch. I've found a THIN rubber glove very useful to launch to give grip. 9x7 it will fly out your hand likewise 9x6, with gentle push 45 degrees, watch out for torque to left.