Mitsubishi S6R S6R2 / S6R- S6R2 — Prime the fuel system
Maintenance · Fuel filter and fuel injection pump
For the Mitsubishi S6R S6R2 / S6R- S6R2, from the Mitsubishi operator's manual.
Applies to: Mitsubishi S6R engine, Mitsubishi PS6 engine
Before you start
- Lock the priming pump cap securely; looseness may cause wear, cap to be shaken off and fuel leakage - a fire hazard
Procedure
- Loosen the air vent plug on the fuel filter about 1.5 turns.
- Turn the priming pump cap to the left to unlock and move it up and down.
- After fuel showing no visible bubbles comes out, tighten the air vent plug.
- Loosen the air vent cap on the fuel injection pump about 1.5 turns.
- Move the priming pump cap up and down.
- After bubble-free fuel comes out, tighten the air vent plug.
- Lock the priming pump cap securely before tightening all air vent plugs.
Tools required
- Wrench Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Tighten priming pump cap by hand then by wrench 120° to 150°; too much more than 240° damages the top
Source: Mitsubishi operator's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.