Instruction manual

Guidelines for Exhaust System and Fuel Selection

Many choices in exhaust systems are available and their performance is directly related to the choice of fuel.

Always use the highest quality A

Ahelicopter only@

@ fuel. The nitro-methane content is an important factor in

choosing an exhaust system.

Exhaust systems can be classified as two types: mufflers (a canister bolted directly to the engine or attached with an O-

ring to an adapter) and tuned pipes (identified by a curved tubing manifold, silicone or Teflon coupler; and a tapered or

cylindrical Atuned pipe@).

Mufflers B generally considered the most Auser friendly@ systems, requiring little or no maintenance, compatible with

all levels of nitro-methane and least sensitive to glow plug choices

The following are to be considered in your selection of an exhaust system:

Muffler Systems

Hatori #9914 80/90 two piece muffler (with AO@ rings)

Hatori #9916 90 two piece muffler (with AO@ rings)

Engines:

Collets and related components for suggested engines (each listed in order of assembly starting at the engine front

bearing):

O.S. 91H

Qty: M.A. USA p/n Description:

1 #0331 M8 x 13 x .50 Shim

1 #0546-6 Base collet

1 #0579-4 Cooling fan/hub

1 #0546-5 Upper collet

1 #0331 M8 x 13 x .50 Shim

1 Hex nut

Y.S.(Yamada) .80

Qty: M.A. USA p/n Description:

1 #0546-6 Base collet

1 #0579-4 Cooling fan/hub

1 #0546-5 Upper collet

2 #0331 M8 x 13 x .50 Shim

1 Hex nut