Automixing System - TOHATSU 40 Service Manual

AUTOMIXING SYSTEM

Routine inspection of the oil automixing system should be
performed once a season.
Inspection
1. Inspect entire automixing circuit for leaks. Check all hose
connections, clamps must be tight.
Check for leakage from pump and between surface of pump
1
and crankcase. If leakage exists, remove pump and inspect
o-ring (1) for damage or deterioration. Apply acceptable 2cycle
engine oil to replacement o-ring and test oil pump output, this
section. If further damage is suspect, disassemble pump and
check for internal gear damage. Replace pump as required.
2. Inspect oil hoses for kinks and damage.
3. Inspect overall condition of oil tank and cap air vent.
4. Service the oil filter. See Fuel and Oil Filters, this section.
5. Check oil pump link rod is secure and lubricate the ball joint with
low temperature lithium grease.
6. Test low oil warning systems, pilot warning lamp, and warning
horn. See Operator Alert Systems in Section 2.
7. Test the oil tank level sensor and oil automixing check valve, this
section.
Function Test - Oil Pump Output
Perform this test with the engine in a test tank or on the boat.
Ensure all air has been purged from oil system.
Oil pump output to engine will be cutoff during
testing. Perform test with a 50:1 gasoline/oil
mixture in the fuel tank.
1. Prepare a 50:1 gasoline/oil mixture in fuel tank. Connect tank to
engine.
2. Check oil tank is at least 1/2 full.
3. Disconnect the oil pump link rod from the oil pump control lever.
3-/ 4-Cylinder
CAUTION
FUEL SYSTEM
T1024
3-17