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Engine basics => Engine set up tips => Topic started by: frank mccune on July 09, 2015, 12:25:41 PM
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Hi All:
I need some tips about starting engines that are equipped with mufflers. I have never used a muffler and I have been able to start my engines very easily without mufflers.
Tia,
Frank McCune
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Start it right side up using your normal procedure.
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Unless your normal procedure involves squirting fuel into the exhaust port -- then you need to do something different.
What I do, which works well with OS LA and OS FP engines, is to choke the thing while pulling the prop through some number of turns (it's different for each engine, but around four). This draws fuel into the crankcase. Then I flip the prop smartly about a dozen times to get the fuel atomized and into the cylinder. Then I put on the lighter, do a bump test if I'm in the mood, then flip the prop. Usually I get one-flip props; I'm rarely stuck on the flight line flippin' and swearin'.
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My preferred engine currently is the ST .51. I Use the same method of priming the engine which is about 4 turns - then connect the battery and slowly pull the prop thru. I will usually get the bump on the 2nd turn and it's a one flip start after that.
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Frank
You need to get out to the field and fly not sit around BS-ing
Also those old iron and steel engines should be put on EBay
use the newer ABC versions they start much easier
Fred Q
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Hi Fred:
I got out Tuesday and twice last week! I usually fly twice a week and you? Lol I am planning to get out tomorrow. See you at the field.
Be well,
Frank
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RC guys use mufflers and electric starters.
Mainly because they're chicken.
Chicken of noise complaints and chicken to flip the prop.
But in combination, mufflers and electric starters go together.
The muffler makes the engine run hot and need the starter.
So just spent $50 bucks for a starter, battery, and charger and quit getting a sore arm.
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Frank
You need to get out to the field and fly not sit around BS-ing
Also those old iron and steel engines should be put on EBay
use the newer ABC versions they start much easier
Fred Q
I tried to tell him that, Fred. He just won't give up that old OS Max H40 S?P
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While I'm pulling the prop through the choke turns, I tilt the nose up to help the fuel run back into the crankcase. And then do as suggested, a few quick un-choked flips to aerate it and wet the combustion chamber.
Rusty
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Hi Paul, Bill, Fred et. al.:
I already have a couple of electric starters, battery, and charger so that part is well covered. Old age has caught up with my fingers and hand flipping leaves a lasting impression! Lol
The engines that I am planning to use are the O.S. .35S, O.S. .40S and a Fox .40 Stunt circa 1971. The old O.S. .40 Stunt circa late 60's is the one that has .40 with a S under it. This engine is equipped with a single ball bearing in the rear and a single ring. I think that it was tuned for stunt use. I have at least two of these engines and they are great running engines! One is in the Nobler that I got from Fred. They both are like new so why not use them? I also have a LA .40 and the older LA? FP ? with the extra boost port mounted in other airplanes. Yes, they are easy starting and they run very well. I think that there is only about 500 rpms gained by the newer .40 O.S. engines. Not enough to make me change!
Fred, how about meeting at the field tomorrow at 1100 or 11:00 a.m. for some round and round? There are people flying as I type this at noon Friday.
The muffler issue appeared in my crystal ball last week. I think that it is just a matter of time before we have a noise problem at our field!
Be well my friends,
Frank
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Hey, if you can get those engines to start and run to your satisfaction, more power to you. I had one of my heroes, aka Marvin Denny, show and tell me, first thing when getting to the field to fly is to prime and start the engine before hooking up lines and filling the tank. Especially on cool days and when an engine hasn't been run for a while. Works great most of the time as then I don't have to turn plane over on inverted set ups. But, as you know each engine is different.
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Hi All:
My engine starting fears were unfounded as both OS .35 engines started very easily with mufflers attached. One was a first flip starter and the other became cranky as the day wore on and an electric starter was used.
Thanks for the tips.
Frank McCune