O.S. Engines 91SZ-H - Manual (Page 5)

8
Note on heating the glow plug
The heatsink head on the engine is
treated with Alumite which does not
conduct current. Therefore, when
heating a glow plug, connect one
lead to the glow plug and the other
to the head of cover plate retaining
screw.
Example
9
This is a high performance engine
expressly designed for F3C
competition. The engine uses the
same mounting hole spacing as the
O.S. 61SX-H RING WC making them
interchangeable. However, higher gear
ratio is required for the MAX-91SZ-H
RING which generates maximum
power at lower rpm than the 61 size
engines. New design 60M-C carburetor
has three adjustable controls which
enables independent adjustment at
idling, hovering and high speed.
INTRODUCTION
Standard accessories
Glow Plug No.8
Woodruff Key
Needle Adjusting Screw (M2.6x5 2pcs.)
Instruction manual
Carburetor Complete 60M-C
Note:
As delivered, the carburetor is not
installed on the engine.
Carburetor Rubber Gasket
Carburetor Retainer Assembly
(M2.6x18)
Head Gasket
0.2mm 0.1mm