Thread Tools
Old Apr 04, 2006, 09:04 AM
wiz310 is offline
Find More Posts by wiz310
In love with my Rappy
Help!

OS 91 FS 4 stroke instruction manual


I'm currently looking for a manual for the OS 91 FS four stroke engine that tells all about tuning, parts list, what bits do what.
I bought a model with this engine in it and had a bugger of a job getting it to run. finally sorted out the problem (had the wrong plug and was detonating at higher revs) but I would like to read a little on the motor and suggested tuning methods.
If any one has a copy to spare or can scan it and put it up here or email it, I would be very appreciative.
I never owned a four stroke before. Having just taken the hobby up again after a looooong break, I am suprised at how far the technoligy has come in both gas/glow and electric engines. Its waaay cheaper to fly now with the good gear than it was when I was a kid.
I was king of the block with a frog 15 diesel and a sanwa four chnl back then.
Cheers, Wiz
Sign up now
to remove ads between posts
Old Apr 04, 2006, 10:28 AM
wiz310 is offline
Find More Posts by wiz310
In love with my Rappy
Thanks Kim Yong. you are a gentleman and a scholar.
that is as close to perfect as one can wish for.
Last edited by wiz310; Apr 04, 2006 at 10:34 AM.
Old Nov 17, 2014, 01:29 AM
shoestring1958 is offline
Find More Posts by shoestring1958
Registered User
Hey guys, Im also looking for specs or a manual for a very old OS 91 four stroke, This is a non Surpass engine.
Old Nov 17, 2014, 03:51 PM
dmrcflyr2 is online now
Find More Posts by dmrcflyr2
Engine man
dmrcflyr2's Avatar
Is this the one you are looking for?
Old Nov 17, 2014, 06:02 PM
shoestring1958 is offline
Find More Posts by shoestring1958
Registered User
You bet dmrcflyr2! Thank you so much.


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
os 61 fs 4 stroke questions DeaninMilwaukee Engines 5 May 31, 2009 05:14 PM
Help! OS 52 FS 4 Stroke londonboy Engines 2 Nov 26, 2006 01:47 PM
Sold OS 91 Surpass 4 Stroke Engine Vanguard Aircraft - Fuel - Engines and Accessories (FS/W) 0 Jul 23, 2006 06:31 PM
Sold os 52 fs 4 stroke philfun Aircraft - Fuel - Airplanes (FS/W) 4 Sep 27, 2005 04:25 AM
OS .91 surpass 4 stroke with mount, fuel filter, tank, prop, spinner Steve H. Aircraft - Fuel - Airplanes (FS/W) 2 Jul 01, 2004 10:01 PM