Engine uses too much oil or smokes excessively
1. Restricted breather operation.
2. Restricted oil filter.
3. . Piston rings badly worn or broken.
4. Valve guides or seals worn.
5. Oil diluted with gas.
Engine leaks oil from cases, hoses, etc.
1. Loose parts.
2. Imperfect seal at gaskets, washers, etc.
3. Restricted breather hose to air filter.
4. Restricted oil filter.
5. Porosity.
Low oil pressure
1. Oil underfilled.
2. Faulty low oil pressure switch.
3. Oil pump о-ring damaged or missing.
4. Bypass valve stuck in open position.
5. Oil diluted with gas.
6. Open in oiling circuit.
High oil pressure
1. Overfilled with oil.
2. Bypass valve stuck in closed position.