Tips To Maintain Good Enine Performance

3. Clean cooling fins on motor as dirt and dust retard the cooling efficiency of the motor. Also clean fly wheel fan. See page 28, section 5, paragraph 2 in the Shop Manual.

4. Clean air filter and check air cleaner hose to be sure there are no holes or leaks and the connections are tight.

5. Check and clean gasoline tank, fuel line, and sediment bowls.

6. Check fuel dispenser at the bottom of the carburetor. If found to be dirty, this should be replaced. If you feel carburetor needs further repair, see page 25 in the Shop Manual. But first see #10 on this list regarding oil seals as this may be the problem and not the carburetor.

7. Check and clean spark plug. Gap may be set too close. Recommended gap is .027".

8. Check magneto points and adjust if necessary. These may be burned or pitted. If this condition exists, it will be necessary to replace these with new parts. Fairbanks Morse point gap is .020. Edison Splitorf point gap is .015.

9. Check timing. See: Timing Instructions.

10. Check to see if the transmission oil is leaking into the engine crankcase. This is done by removing the plug at the bottom of the crankcase, and if you find transmission oil in the case, it is an indication that the oil is leaking through the seal between the engine and the transmission. There should be no excess oil in the crankcase at any time. A leaking rear seal causes fouling of the spark plug and carbon to form on the engine ports and also hampers proper fuel mixture in the firing chamber. The moving engine parts such as the crankshaft, piston assembly, etc., are lubricated by an oil vapor in the crankcase. A leaky front seal dilutes this oil vapor and causes insufficient lubrication the reach these parts and bearings ...see page 2 of the Parts catalog. With the installation of new seals, #5012, your difficulty should be eliminated.

-- Frazer Farm