Mufflers for older four-cycles
03-09-2015, 06:17 AM
#1
Mufflers for older four-cycles
I have a pair of older OS four-cycle engines that I plan to use in upcoming antique competitions. They are the FS-60 (open rocker) and the FS-90 (rear rocker) engines.
The rules for the events require mufflers on all engines. Did OS ever make a muffler to fit either of these? If not, do you know of any mufflers for later OS four-cycles that I may be able to adapt for them?
The rules for the events require mufflers on all engines. Did OS ever make a muffler to fit either of these? If not, do you know of any mufflers for later OS four-cycles that I may be able to adapt for them?
03-10-2015, 06:01 AM
#2
My Feedback: (11)
For the initial series of O.S. engines, there were no mufflers made for them. They were considered quiet enough, especially when compared to the howling two-stroke engines of the day. The original FS-91 did have a muffler available for it, but it is no longer available from us or O.S. in Japan. You'd have to locate one from a collector.
