Engine question (OS32SX)

[The Observer]

OK, it flies.

The engine starts and idles OK at the beginning, runs up smoothly, and
runs fine while flying at all load levels. After landing, as I throttle
back to idle, it abruptly stops. It's done this on every flight. I'm
running it with muffler pressure on the tank.

Suggestions?

J

[vincee]

"The Observer" <penniless@ameritech.net> wrote in message
news:c72psv$h5v98$1@ID-75863.news.uni-berlin.de...
> OK, it flies.
>
> The engine starts and idles OK at the beginning, runs up smoothly, and
> runs fine while flying at all load levels. After landing, as I throttle
> back to idle, it abruptly stops. It's done this on every flight. I'm
> running it with muffler pressure on the tank.
>
> Suggestions?
>
> J
>

Did you remember to set the throttle trim for idle at low stick?

[Mike]

>Subject: Engine question (OS32SX)
>From: The Observer penniless@ameritech.net
>Date: 02/05/2004 13:34 GMT Daylight Time
>Message-id: <c72psv$h5v98$1@ID-75863.news.uni-berlin.de>
>
>OK, it flies.
>
>The engine starts and idles OK at the beginning, runs up smoothly, and
>runs fine while flying at all load levels. After landing, as I throttle
>back to idle, it abruptly stops. It's done this on every flight. I'm
>running it with muffler pressure on the tank.
>
>Suggestions?
>
>J
>
Quick reply as I have flying to do!!!

Richen both the needles, (quarter turn on both at a guess). It's probably
running leaner as it gets hotter. There should be plenty of smoke all through
the range.

If that doesn't work, you could try changing the glow plug, or just increasing
the tickover speed slightly.

[The Observer]

Thanks, it seems plenty smoky but I'll richen it a bit. The idle speed
is already high.

Mike wrote:
>>Subject: Engine question (OS32SX)
>>From: The Observer penniless@ameritech.net
>>Date: 02/05/2004 13:34 GMT Daylight Time
>>Message-id: <c72psv$h5v98$1@ID-75863.news.uni-berlin.de>
>>
>>OK, it flies.
>>
>>The engine starts and idles OK at the beginning, runs up smoothly, and
>>runs fine while flying at all load levels. After landing, as I throttle
>>back to idle, it abruptly stops. It's done this on every flight. I'm
>>running it with muffler pressure on the tank.
>>
>>Suggestions?
>>
>>J
>>
>
> Quick reply as I have flying to do!!!
>
> Richen both the needles, (quarter turn on both at a guess). It's probably
> running leaner as it gets hotter. There should be plenty of smoke all through
> the range.
>
> If that doesn't work, you could try changing the glow plug, or just increasing
> the tickover speed slightly.

[The Observer]

Well, it doesn't like being rich! That made it worse.

I think I'll try a genuine OS plug next.

The Observer wrote:

> Thanks, it seems plenty smoky but I'll richen it a bit. The idle speed
> is already high.
>
> Mike wrote:
>
>>> Subject: Engine question (OS32SX)
>>> From: The Observer penniless@ameritech.net Date: 02/05/2004 13:34 GMT
>>> Daylight Time
>>> Message-id: <c72psv$h5v98$1@ID-75863.news.uni-berlin.de>
>>>
>>> OK, it flies.
>>>
>>> The engine starts and idles OK at the beginning, runs up smoothly,
>>> and runs fine while flying at all load levels. After landing, as I
>>> throttle back to idle, it abruptly stops. It's done this on every
>>> flight. I'm running it with muffler pressure on the tank.
>>>
>>> Suggestions?
>>>
>>> J
>>>
>>
>> Quick reply as I have flying to do!!!
>>
>> Richen both the needles, (quarter turn on both at a guess). It's probably
>> running leaner as it gets hotter. There should be plenty of smoke all
>> through
>> the range.
>>
>> If that doesn't work, you could try changing the glow plug, or just
>> increasing
>> the tickover speed slightly.
>
>

[Mike]

>Subject: Re: Engine question (OS32SX)
>From: The Observer penniless@ameritech.net
>Date: 04/05/2004 00:22 GMT Daylight Time
>Message-id: <c76k6m$c05i$2@ID-75863.news.uni-berlin.de>
>
>Well, it doesn't like being rich! That made it worse.
>
>I think I'll try a genuine OS plug next.

Sorry about that, it's very difficult to diagnose a problem without seeing it
in action. Good luck with the plug, at least you have ruled out lean running
:-)





>
>The Observer wrote:
>
>> Thanks, it seems plenty smoky but I'll richen it a bit. The idle speed
>> is already high.
>>
>> Mike wrote:
>>
>>>> Subject: Engine question (OS32SX)
>>>> From: The Observer penniless@ameritech.net Date: 02/05/2004 13:34 GMT
>>>> Daylight Time
>>>> Message-id: <c72psv$h5v98$1@ID-75863.news.uni-berlin.de>
>>>>
>>>> OK, it flies.
>>>>
>>>> The engine starts and idles OK at the beginning, runs up smoothly,
>>>> and runs fine while flying at all load levels. After landing, as I
>>>> throttle back to idle, it abruptly stops. It's done this on every
>>>> flight. I'm running it with muffler pressure on the tank.
>>>>
>>>> Suggestions?
>>>>
>>>> J
>>>>
>>>
>>> Quick reply as I have flying to do!!!
>>>
>>> Richen both the needles, (quarter turn on both at a guess). It's probably
>>> running leaner as it gets hotter. There should be plenty of smoke all
>>> through
>>> the range.
>>>
>>> If that doesn't work, you could try changing the glow plug, or just
>>> increasing
>>> the tickover speed slightly.
>>

[The Observer]

Plug fixed it. Genuine OS No. 8 and and it runs like a champion.

Mike wrote:
>>Subject: Re: Engine question (OS32SX)
>>From: The Observer penniless@ameritech.net
>>Date: 04/05/2004 00:22 GMT Daylight Time
>>Message-id: <c76k6m$c05i$2@ID-75863.news.uni-berlin.de>
>>
>>Well, it doesn't like being rich! That made it worse.
>>
>>I think I'll try a genuine OS plug next.
>
>
> Sorry about that, it's very difficult to diagnose a problem without seeing it
> in action. Good luck with the plug, at least you have ruled out lean running
> :-)
>
>
>
>
>
>
>>The Observer wrote:
>>
>>
>>>Thanks, it seems plenty smoky but I'll richen it a bit. The idle speed
>>>is already high.
>>>
>>>Mike wrote:
>>>
>>>
>>>>>Subject: Engine question (OS32SX)
>>>>>From: The Observer penniless@ameritech.net Date: 02/05/2004 13:34 GMT
>>>>>Daylight Time
>>>>>Message-id: <c72psv$h5v98$1@ID-75863.news.uni-berlin.de>
>>>>>
>>>>>OK, it flies.
>>>>>
>>>>>The engine starts and idles OK at the beginning, runs up smoothly,
>>>>>and runs fine while flying at all load levels. After landing, as I
>>>>>throttle back to idle, it abruptly stops. It's done this on every
>>>>>flight. I'm running it with muffler pressure on the tank.
>>>>>
>>>>>Suggestions?
>>>>>
>>>>>J
>>>>>
>>>>
>>>>Quick reply as I have flying to do!!!
>>>>
>>>>Richen both the needles, (quarter turn on both at a guess). It's probably
>>>>running leaner as it gets hotter. There should be plenty of smoke all
>>>>through
>>>>the range.
>>>>
>>>>If that doesn't work, you could try changing the glow plug, or just
>>>>increasing
>>>>the tickover speed slightly.
>>>
>