TOMAHAWK SPORT BLACK BLOCK 62-SGW, Instruction Manual

5

ENGLISH

FUEL

This engine requires a mix of 32:1 gas to oil ratio for break-in and normal operation. 

To properly mix the fuel, add 4.0 oz of high quality 2-stroke oil to one gallon (or 32 mL of oil to one 

liter) of 87–93 octane fuel.

We tested primarily with Red Line two-stroke oil. Other high-quality two-stroke oils will also work 

well. Mixtures as rich as 25:1 are acceptable.

ENGINE BREAK-IN

Your engine has been test run at the factory but not fine tuned. It needs to be broken-in to ensure long life 

of all components. This engine features a ringed-piston design, which requires a specific break-in proce

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dure to ensure a tight seal between the piston ring and cylinder. For this to be accomplished, this process 

requires repeated heating and cooling cycles. The ring needs to seat itself with the cylinder walls for it to 

develop a good seal.

Perform the break-in process with the engine mounted on your airplane. There is no need to 

bench-run the engine prior to mounting it on your airplane.

Use a lightly loaded break-in prop to begin your break-in process (22 x 10 or 23 x 9)

Use the recommended fuel with a 32:1 gas to oil ratio.

• 

First tank of fuel:  

Run the engine on the 

ground for its first tank of fuel and DO NOT 

exceed 4000 RPM. Cycle the throttle bet

-

ween idle and half throttle every minute. 

• 

Second tank of fuel: 

Do not run at full 

throttle on the ground for more than 30 

seconds at a time. Fly the airplane and avoid  

extended periods of heating the engine. Be 

sure to mix in some cooling dives and lower-

throttle flying.

• 

Third tank of fuel: 

Fly the engine at high 

throttle settings for longer periods of time, 

up to one minute. This will help the piston 

ring and cylinder to expand and contract, 

helping the breaking-in process. 

• 

Fourth tank of fuel: 

Select one of the 

recommended propellers for normal opera

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tion and mount it on your engine. Continue 

to break-in the engine in flight. Use high 

throttle settings for extended periods of 

time. Monitor cylinder head temperatures 

to avoid overheating.

STARTING AND RUNNING THE ENGINE

It is critical to the proper operation of your 62-SGW that you use the included filtered clunk. Fuel 

should be filtered in your fueling system before it enters your model. Failure to properly filter the 

fuel before it reaches your engine can introduce contamination into the fuel system.