OS140 RX - Problem

[Scott Anderson]

Lance ,

Did you get my email thru your web site?

Scott Anderson
NSRCA D3 AVP


----- Original Message ----- 
From: "Lance Van Nostrand" <patterndude at comcast.net>
To: <discussion at nsrca.org>
Sent: Sunday, August 28, 2005 11:19 PM
Subject: Re: OS140 RX - Problem


> You might also make sure the ring is properly located on the piston.  Some 
> pins in the piston are shorter than others and actually allow assembly 
> with th ering rotated
> --Lance
>
> ----- Original Message ----- 
> From: "Mortons" <jrmmorton at earthlink.net>
> To: <discussion at nsrca.org>
> Sent: Sunday, August 28, 2005 5:41 PM
> Subject: Re: OS140 RX - Problem
>
>
>> Amran,
>>
>> Something similar happened to mine (at a contest no less) and some of the 
>> nickel plating on the cylinder liner had flaked off at the exhaust port. 
>> I replaced the piston and cylinder with a Performance Specialties AAC and 
>> have had no problems since (and a bit more power too). Please look at 
>> your piston and sleeve.
>>
>> Ray
>>
>> Amram Private wrote:
>>
>>>Hello to all.
>>>The story is about OS140RX with OS header, ES CF tune pipe, fuel 20%
>>>Nitro 16% oil.
>>>Engine gained 28 hours with no problems whatsoever. Time has come to
>>>replace the bearings as I stared to notice some freedom. I was able to
>>>get the FAI bearings set on Thursday so before changing the bearings I 
>>>decided to go for few
>>>more flight on Friday and then to change. On Friday at field,  I was
>>>able to start the motor normally. While on Idle when I was ready to lift 
>>>the model and take it
>>>to the runway, the motor stopped. This was strange as it used to hold
>>>very steady idle. Since then I could not start the motor. The motor
>>>seems to be with low compression. Today I opened the motor and changed
>>>the bearings. All motor internal parts seems to OK and clean with no
>>>special dirt or signs. Still the motor does not start and still the
>>>feeling is of low compression. Is looks like the motor "Wants" to start
>>>but not enough power. Fuel supply is OK as when I prime, fuel comes out
>>>on the carb. (Motor is upside down). Plug is completely new (Type F),
>>>Booster is OK ProDiver Mark III - Radio South (Same problem when I tried
>>>a normal booster). The motor build-in fuel pump never been touched.
>>>
>>>Any Ideas?
>>>
>>>Thanks in advance to all helpers
>>>Amram Leshed
>>>
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>>>
>>
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>
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