633GC OPERATOR’S MANUAL
6
SAFETY
THE FOLLOWING SYMBOL APPLIES TO ALL ITEMS LISTED ON THIS PAGE
A potential situation exists which, if not avoided, may result in
product or property damage.
Note: The diamond chainsaw is equipped with a two-stroke engine and must always be run using
a mixture of gasoline and two-stroke engine oil. It is important to accurately measure the amount
of oil to be mixed to ensure that correct mixture is obtained. When mixing small amounts of fuel,
even small inaccuracies can drastically affect the ratio of the mixture.
•
This engine is designed to be operated on unleaded gasoline.
•
Use high quality, unleaded gasoline with a minimum octane rating of 90. If lower octane
gasoline is used, engine temperature will increase which can result in a piston seizure and
damage to the engine.
•
Use “high quality” two-stroke engine oil, which is specifically developed for chain saws. Fuel
mixture: 4%, 25:1 gasoline/oil mixture. This is twice as much oil as 50:1. Incorrect fuel
mixture is the number one cause of piston seizure failure.
•
Never use two-stroke oil intended for water-cooled engines, such as outboard engine oil.
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Never use oil intended for four-stroke engines.
ENGINE BREAK-IN
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It is very important to break-in a new engine to “seat” all moving parts, especially the piston
rings.
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To break-in the engine, run one full tank of 25:1 fuel at idle, cycling the throttle every 5 to 10
minutes to prevent loading.
•
Failure to break-in an engine can result in piston seizure.
IMPORTANT
Summary of Contents for 633GC
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