Tx Starflame Engines - Polaris TX Starfire Owner's Manual

TX STARFLAME ENGINES
Twin Cylinder
Three Cylinder
EC 29PR 294cc
E C 43P R 439cc
E C 34P R 335cc EC 65PR 649cc
Your Polaris TX Starfire snowmobile is equipped with a de-
pendable, high-performance TX Starflarne fully modified two-
cycle engine. Treat it right . . . give it reasonable care. The
first step is to have a basic comprehension of the mechanics
involved in its operation. Understanding your two-cycle engine
and how it functions will enable you to better maintain your
engine, resulting in longer and better performance and life at
less cost to you.
A basic component of the TX Starflame two-cycle engine is
the piston. When the piston moves upward in the cylinder
(1st stroke), it draws fuel into the crankcase while also com-
pressing fuel in the combustion chamber. The spark plug then
ignites the fue l, which expands and forces the piston downward.
The down-stroke provides the power which turns the crank-
shaft. It also compresses fuel in the crankcase, exposes the trans-
fer ports in the cylinder wall and releases a new supply of fuel
through the ports and into the combustion chamber. This forces
the burned gases out through the exhaust ports.
When you realize that at 6,000 RPM, this happens 100 times a
second, you can appreciate the importance of proper lubrica-
tion, fuel mixture, and carburetor adjustments.
34