O.S. Engines 91HZ-R - Manual (Page 6)

10
Note on heating the glow plug
Example
The heatsink head on the engine is
treated with an anodized finish which
does not conduct current. Therefore,
when heating the glow plug, connect
one lead to the glow plug and the
other to the head or cover plate
retaining screw.
11
INTRODUCTION
Standard accessories
Glow Plug No.8
Needle Adjusting Screw
(M2.6x5 2pcs.)
Check Valve
Head Gasket (0.2mm)
The MAX-91HZ-R has been developed based on
the 91HZ designed expressly for 90 size
helicopter models, and equipped with the new
O.S. regulator system.
The regulator system ensures an always steady
fuel supply which is required for 3D flights which
require repeated vigorous attitude changes as
well as for F3C flights which require severe
mixture control. With this system, the fuel tank is
pressurized by pressure generated in the
crankcase. The fuel sent by pressure is regulated
by the regulator installed just ahead of the
carburetor, then sent into the engine.
The 61E-R carburetor is equipped with twin
needles which enable adjustment of the idling /
hovering and high speed mixture independently.
The cover plate has a cell to accept a sensor
designed to install in the cover plate from the
Futaba GY-701 Governor.
As delivered, the engine has the
carburetor lightly fit into the intake.
Secure it changing the angle according
to the model.
NOTE