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10-25-2006 02:11 PM  12 years agoPost 1
penrynboy

rrNovice

england

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Hi, I'm still fairly new to this hobby and looking for some help please :-)
Have just fitted a OS32 engine with a zimmerman muffler to my century hawk pro, can anyone help me with the base settings for the carb, I have got it running and it doesn't sound to bad but the back plate feels very hot and it does seem to lose rev's the further I open the throttle, does this mean it's running to lean at the bottom or to rich at the top or perhaps both!!! Any help would be greatly appreciated, Cheers

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10-25-2006 02:18 PM  12 years agoPost 2
Nightstalker

rrElite Veteran

UK (BEDFORDSHIRE)

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ajust or main needel to 2 1/2 turns and start from there, if its a brand new engine u need it cool or u will be soon buying a new engine,

where in the uk are u??

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10-25-2006 02:47 PM  12 years agoPost 3
Rcer22

rrVeteran

Somewhere In The Adirondack Mountains

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If it's hot it's lean. Set the low end so when you pinch the fuel line at idle the engine picks up in RPM after a few seconds. If it tries do die right away then your too lean on the low side.
Set the high side so when you goose the throttle all the way up the motor doesn't fall off in RPM and try to die. You will know it's too rich if you see a lot of smoke and it sounds sloppy rich. You know it's too lean if you don't see much smoke and it tries to die shortly after you give it full throttle. And the engine will be hot to the touch. After you get the high side good do the low side again. Favor the rich side on both settings.

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10-25-2006 11:49 PM  12 years agoPost 4
penrynboy

rrNovice

england

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settings
Thanks, theres a couple of things to be going on with :-) and as to where am I, I'm in the midlands not to far away from coventry, cheers

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10-31-2006 02:13 PM  11 years agoPost 5
kraaijer

rrNovice

Linkebeek, Belgium

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Adding to that, use fuel with plenty of Nitro (20, or 30%) that'll help to cool the engine.

Ron

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10-31-2006 02:42 PM  11 years agoPost 6
ba board

rrVeteran

England

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Have the same machine and just use a 10% mix(Bekra 10) on an OS32. No problem. In fact the same fuel is used by just about everybody at my club.

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