TOHATSU 40 Service Manual page 67

Models 60 / 70 / 80 / 90:
• Oil level indicator on tachometer illuminates and warning horn
sounds when float makes contact with sensor switch.
Models 40 / 50 with remote control:
• Oil level indicator on tachometer illuminates and warning horn
sounds when float makes contact with sensor switch.
Models 40 / 50 with tiller control:
• Pilot lamp on lower motor cover illuminates when float makes
contact with sensor switch.
5. Re-install oil level sensor. Apply a silicone-based sealant to the
sensor cap.
Function Test - Automixing Check Valve
1. Disconnect the oil INPUT hose and fuel OUTPUT hose from the
automixing check valve.
2. Connect a gear case pressure tester to the oil INPUT fitting on
automixing check valve.
3. Slowly pump up pressure and watch gauge. Gauge reading
should drop off at 5 psi [34 kPa/0.34 kg/cm
has opened. If pressure drops at lower or higher reading, replace
the valve.
Bleeding the Automixing System
Always bleed the air from the oil automixing system in the following
situations:
• When the engine is new from the factory.
• After engine runs out of oil.
• After checking the oil filter element.
• After disconnecting any oil hose between the oil tank and pump.
1. Fill the oil tank.
2. Momentarily run engine to ensure the oil system is pressurized.
Stop engine.
5
3. Loosen air bleed screw (1) on oil pump.
4. Visually check no air remains in the transparent oil hoses from
tank to filter and from filter to pump, then tighten the bleed screw.
5. Start and idle engine in NEUTRAL until no air remains in the
transparent oil hose between pump and automixing check valve.
To purge the air more quickly, remove oil pump link
rod and idle engine with pump control lever in WIDE
OPEN position.
3-/ 4-Cylinder
], indicating the valve
2
NOTE
FUEL SYSTEM
T1028
3-19