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Old 09-19-2010, 08:45 AM
  #1  
wattmeter
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Default OS Engines

what is the difference between a OS 40FP and a OS 40FSR if any
wattmeter
Old 09-19-2010, 09:02 AM
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Default RE: OS Engines

the FP series is an economical sport series motor, while the FSR series were the best engine OS ever produced before going all ABN cyl/piston construction.

the FP has a plain bronze crankshaft/crankcase (no ball bearings), while the FSR series has Ball bearing supported crankshaft.

the FP has simple airbleed idle adjust, while the FSR has a mixture needle adjust for idle.

picture of the FSR,
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Old 09-19-2010, 09:21 AM
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Default RE: OS Engines


ORIGINAL: summerwind

the FP series is an economical sport series motor, while the FSR series were the best engine OS ever produced before going all ABN cyl/piston construction.

the FP has a plain bronze crankshaft/crankcase (no ball bearings), while the FSR series has Ball bearing supported crankshaft.

the FP has simple airbleed idle adjust, while the FSR has a mixture needle adjust for idle.

picture of the FSR,
Thanks for the respone, I have been unable to find a manuel on the FSR,I have it on a SuperStar and it runs great.
I lost a bolt from the muffler and I not sure what size it is,I'm sure its metric and about 1/2" long.
Again Thanks
wattmeter
Old 09-19-2010, 09:36 AM
  #4  
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Default RE: OS Engines

Take the remaining bolt to your LHS AND THEY CAN MATCH.

Gary
Old 09-19-2010, 10:00 AM
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Default RE: OS Engines

Or take it to your local Home Depot. They cam match it and you'll pay about 80% less
Old 09-19-2010, 03:23 PM
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Default RE: OS Engines


ORIGINAL: wattmeter


ORIGINAL: summerwind

the FP series is an economical sport series motor, while the FSR series were the best engine OS ever produced before going all ABN cyl/piston construction.

the FP has a plain bronze crankshaft/crankcase (no ball bearings), while the FSR series has Ball bearing supported crankshaft.

the FP has simple airbleed idle adjust, while the FSR has a mixture needle adjust for idle.

picture of the FSR,
Thanks for the respone, I have been unable to find a manuel on the FSR,I have it on a SuperStar and it runs great.
I lost a bolt from the muffler and I not sure what size it is,I'm sure its metric and about 1/2'' long.
Again Thanks
wattmeter
i posted the manual sheets in the other thread too for you.......click on them, and then click the icon on the lower right to fully expand.
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Old 09-19-2010, 04:39 PM
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Default RE: OS Engines

Summerwind
Thank you so much
wattmeter
Old 09-21-2010, 10:14 AM
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Default RE: OS Engines


ORIGINAL: Roo Man

Take the remaining bolt to your LHS AND THEY CAN MATCH.

Gary
I tried that, had no luck seems it is a 3.5mm bolt and Lowe's, True Value, and Fastenal only carry 3mm -4mm NO 3.5mm
But Thanks you never know
wattmeter[]
Old 09-21-2010, 11:27 AM
  #9  
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Default RE: OS Engines

But Thanks you never know
Check around at farm supply stores (we have Agway) who service chainsaws. They have a great assortment of metric and usually, if you're nice, they'll give you one free. Also a great source of parts for Walbro carbs.
Old 09-21-2010, 12:42 PM
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Default RE: OS Engines

RTL Fasteners has 3.5 metric bolts:

http://rtlfasteners.com/RC/r1.html

I have used them in the past with good results.

Bruce
Old 07-12-2011, 12:58 PM
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Default RE: OS Engines

Hi, looking at this post, i want to ask if somebody got by any chance the OS 40fp manual?. I just bought one New In Box but without that manual. that i plan to put on a General Hobby Piper Cub J3 40.

Thanks.

Donald
Old 07-12-2011, 02:02 PM
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Default RE: OS Engines

............
Old 07-17-2011, 09:56 AM
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Default RE: OS Engines

Here you go Wrangler1 page 1 of 4
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Old 07-17-2011, 09:57 AM
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Page 2 of 4
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Old 07-17-2011, 09:59 AM
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Default RE: OS Engines

3
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Old 07-17-2011, 10:00 AM
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4 of 4
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Old 07-18-2011, 07:06 AM
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Default RE: OS Engines

Rotten 40851.

Thank you very much, really appreciate that. !!!!
Old 07-18-2011, 10:46 AM
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Default RE: OS Engines

Glad to help Wrangler1, enjoy the 40 FP it is a very good running engine.

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