Cub Cadet 71 manual Electricalsystem

ELECTRICALSYSTEM

SPARKPLUGIGNITIONTIMING

Note: Remove all dirt from the base of the spark plug before removing the spark plug.

Remove the spark plug after every 100 hours of operation for cleaning and checking the gap. SeeIllust. 15. When making this adjust-

ment, always bend the outer electrode. Never

bend the center electrode, as it may damag:!

the insulator. If the gap between the electrodes is too great, the engine will misfire and be hard to start.

Always use a spark plug wrench when re- moving or reinstalling the plug.

Be sure the gasket is in good condition, and screw the plug in tightly. Do not tighten more than enough to compress the gasket to seal the plug and assure a good heat transfer between the plug and the cylinder head. Tighten the plug 1/2 to 3/4 turns past finger tight.

Illust.15A

Adjusting the breaker paints.

Set gap at .O20-inch.

Remove the breaker point cover after every 100 hours of operation for cleaning the points and resetting the gap (1IIust.15A). Replace badly pitted or burned points.

For more precise timing, a timing light should be used. The engine has a timing sight hole which is located in the right s ide of the

engine bearing plate on the International Cub Cadet 71 Tractor or in the right side of the

blower housing in the International Cub Cadet

102, 122 and 123 Tractors. SeeIllust.15B.

With the engine running at 1/3 throttle. or more, adjust the breaker points until the "SP" mark on the flywheel is centered in the sight hole. Note: The "Spl' mark will appear 20degrees

before top dead center. The other mark is the top center mark and is stamped with "DC'I below the mark.

(Ilust. 15 Checking the spark plug gap.

Set gap at .O25-inch.

Replace a defective plug with a new plug. See your International Harvester dealer for a correct replacement plug.

Cleaning the Spark Plug

Sandblasting is the recommended method of cleaning the spark plug. Never scrape or clean the insulator with anything which will scratch

the porcelain. Scratched porcelain allows carbon and dirt to accumulate much faster.

Illust. 158

Location of timing sight hole.

(Motor-generotor has been removed to better

illustrate the location).

15