O.S. Flex FS70-91S/70U/FL70/FS81A 330mm 1111D

Tower Stock# LXXE98  •  Manufacturer Stock# 72108130
O.S. Flex FS70-91S/70U/FL70/FS81A 330mm 1111D (large view)
Notes from our tech department:
This is the Flexible Exhaust Extension for the O.S. Max FS-70
and the FS-91 Surpass Four Stroke Engines.
This flex pipe allows you to re-route your silencer further away from the
engine or cowl.

FEATURES

Uses the silencer (muffler) that came with the engine.
Re-routes the exhaust to a more convenient location.
Fits all FS-70 and FS-91 Surpass and Surpass II's.

INCLUDES

One Flexible Exhaust Extension for the O.S. Max FS-70 and the FS-91
Surpass Four Stroke Engines with two locknuts and instruction sheet

REQUIREMENTS

Threading pipe into exhaust port of engine until it stops, then
tightening locknut. Supporting end where silencer is attached to
avoid vibration.

SPECIFICATIONS

Length: 12-3/4" (324mm) not including threaded ends
Length: 13-7/8" (353mm) overall
Diameter of flex pipe: 7/16" (11mm)
Inner Diameter: 1/4" (8mm)
Thread size, both ends: M11x.75 (pitch)

COMMENTS

Bends in the pipe should be made as far away as possible from the
threaded ends. Final adjustment should be made in steps of only 2-
3 degrees at a time. Repeated adjustment to change the shape of
the pipe may weaken the pipe and cause it to break.
JXS 4/16/01
ir/jl
updated jpg 11/8/06

Resources
‐ Mailing Address ‐
‐ Additional Contact Information ‐