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HelicopterEngines Plugs Mufflers Fuel › Piston chipped during hover :)
01-07-2017 09:19 PM  10 months agoPost 1
rowdog_14

rrApprentice

Austell, GA

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Was out hovering and the piston on my OS hyper chipped and stalled the engine. Never had this happen before. Was used on a heli I purchased. Will get a new piston or might just get a whole new one. Engine was running great even though I had it a little rich.

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01-07-2017 11:15 PM  10 months agoPost 2
JuanRodriguez

rrProfessor

The Villages,​Florida

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Most likely run lean at some point....

Been there, done that and old enough to know better.....

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01-08-2017 07:50 AM  10 months agoPost 3
heli4fun

rrNovice

TRUMP, USA

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Not most likely....Definitely a lean run.
your piston sleeve is worth inspecting too along with the head for any pitting from the chip.

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01-08-2017 12:27 PM  10 months agoPost 4
rowdog_14

rrApprentice

Austell, GA

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Ok, must have been from the prior owner and finally fully broke on me. This thing was set to rich after I got it from him. I had set everything to factory. Sucks, risk you take with used stuff, but will say this is the first crapped used engine since I got into the RC hobby back in the early 2000.

Thanks for the input guys. There is a guy locally with a brand new for a little less than retail price.

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01-08-2017 01:13 PM  10 months agoPost 5
JuanRodriguez

rrProfessor

The Villages,​Florida

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Here's a couple of recent classifieds....

https://rc.runryder.com/helicopter/...per&f=GCO&so=-1

Been there, done that and old enough to know better.....

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01-20-2017 03:49 AM  10 months agoPost 6
Gearhead

rrMaster

Vt

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Rowdog,, if I was you I would buy the engine in my link and mount your Hyper Head and your Hyper Carb on it, it will be a great deal for you,

I think the SX and the Hyper have the same cylinder liner,

I know the SX comes with bearings that are labeled

https://rc.runryder.com/helicopter/t814988p1/

Jim
Buzz Buzz Buzz

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01-20-2017 01:32 PM  10 months agoPost 7
Richardmid1

rrProfessor

Leeds, England

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Factory needle settings don't guarantee a rich mixture. You could have an air leak or loose head bolts.

60% of the time, it works every time!

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01-20-2017 08:53 PM  10 months agoPost 8
rowdog_14

rrApprentice

Austell, GA

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Rowdog,, if I was you I would buy the engine in my link and mount your Hyper Head and your Hyper Carb on it, it will be a great deal for you,
I think the SX and the Hyper have the same cylinder liner,
I know the SX comes with bearings that are labeled
https://rc.runryder.com/helicopter/t814988p1/
I will keep that in mind. There is a guy locally that has a NIB Hyper for $190. I will get in touch if I can not get his.
Factory needle settings don't guarantee a rich mixture. You could have an air leak or loose head bolts.
Yep I agree, but I will say this thing was bogged down pretty heavy so I am thinking it was damaged from the guy I purchased it from.

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