Service Points; Fuel Enrichment Pump Inspection; Fuel Enrichment Valve Inspection - Yamaha 40V Service Manual

FUEL
PRIME STARTER

SERVICE POINTS

Fuel enrichment pump inspection

1. Inspect:
Body
Crack/Leak/Damage → Replace.
2. Inspect:
Seat valve
Crack/Distortion → Replace.
3. Inspect:
Diaphragm
Damage → Replace.

Fuel enrichment valve inspection

1. Inspect:
Needle valve 1
Piston valve 2
Wear/Bend/Damage → Replace.
2. Measure:
Fuel enrichment valve resistance
Out of specification → Replace.
Fuel enrichment valve resistance:
Blue - Black
2.32 ~ 3.48 Ω at 20˚C (68˚F)
NOTE:
When measuring the resistance of 10 Ω or
less using the digital tester, the correct
measurement cannot be obtained. Refer to
"Lower resistance measurement" section in
chapter 8.
3. Measure:
Piston valve height a
No change → Replace.
Checking steps:
Connect the 12 V battery.
Wait for several minutes.
Check the piston height.
4-13
E