tHERE ARE MANY MORE THREADS THAN JUST AMERICAN STANDARD AND
METRIC . I AM SORRY BUT I CAN NOT HELP YOU . GOOD LUCK

Originally Posted by Jsutherland8

I have the parts manual for the Royal 0.45 motor, but it had no screws for the muffler, and no spec. in the manual as to what the thread is tapped into the motor. Tried 6-32 and 2 metric taps, with no luck. It is a finer thread than 6-32, but close to the size. ...

Take your muffler to a good hardware store, and start trying screws. From your description, it could be 5-40, 3.5mm, or 3mm.

Originally Posted by Jsutherland8

I have the parts manual for the Royal 0.45 motor, but it had no screws for the muffler, and no spec. in the manual as to what the thread is tapped into the motor. Tried 6-32 and 2 metric taps, with no luck. It is a finer thread than 6-32, but close to the size.

Any one got one ? and know what thread the screws are ?

It's probably a metric thread. 3 or 3.5. The problem could be that they went with a non standard pitch, but that is unlikely. They were OS clones.

Greg

They use the same metric screw the OS uses

Hello everyone i was given a supertigre g60 blue top and i am trying to find a manual for it so i can tune it. at the moment it is very sensitive to adjustments. any help would be appreciated.

Originally Posted by SamoanRCer

Hello everyone i was given a supertigre g60 blue top and i am trying to find a manual for it so i can tune it. at the moment it is very sensitive to adjustments. any help would be appreciated.

all Manuals http://www.supertigre.com/manuals/index.html

Originally Posted by Happymcc

all Manuals http://www.supertigre.com/manuals/index.html

Thanks for looking that up for me Happymcc

Screw size is 3.5mm

dose any one have a 1976 OS .10 fsr manual? I cnat seem to find it even on the OS website that was given above. There is only the la version.

Parts OS 10 fsr

The OS manual link works for me , not sure why your having trouble .

Can not find a manual for it .

The link works for but it dose not have the right manual.

Here is the manual for the OS FS-91S II Fuel Injection engine which I found very hard to find due to the engine now being discontinued, though parts can still be purchased for this engine.
http://manuals.hobbico.com/osm/fs91-ii-fi-manual.pdf

OS 91 S - ll Fuel Injection

tom83 - here's the OS .10FSR
-Dave

I just scanned a Rossi manual. it has parts listings for .21-.90 engines. There is no date, but it should be early to mid 90's.

I also had a manual for a Rossi .90 RV RC marine engine.

www.dieselrc.com/download.html

Greg