90-830234R3 DECEMBER 1997 POWERHEAD - 4-35
Powerhead Disassembly
• Remove fuel pump by removing 2 screws.
• Remove oil injection pump by removing 2 bolts.
• Remove hoses to fuel pump and oil injection
pump.
a
a
b
53992
a - Bolts – Fuel Pump
b - Bolts – Oil Pump
• Remove oil injection pump shaft and housing.
b
a
20041
a - Pump Housing
b - Pump Shaft
• 4 Cylinder Models Only – Remove accelerator
pump hoses from #3 and #4 cylinder check valve
fittings.
• Remove check valves.
a
52478
a - Check Valve (4 Cylinder Models Only)
• Accelerator check valves can be tested for prop-
er performance as follows:
1. Spray a small amount of WD-40 into barbed end
of check valve.
2. Blow out excess WD-40 with high pressure air.
3. Apply suction to barbed end with small air vacu-
um hand pump.
4. Apply suction until valve opens (22-28 inches of
vacuum).
5. Within 30 seconds after stopping suction, vacu-
um should not fall below 5.0 hg.
NOTE: Accelerator check valves should not be
installed in block while honing operations are being
performed nor reinstalled until all block cleaning pro-
cedures have been completed.
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