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HOMESERVICE MANUALSMITSUBISHI1990PRECIS BASE, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCEREMOVE, OVERHAUL & INSTALLENGINE CONTROLS - REMOVE/INSTALL/OVERHAULFUEL SYSTEMCARBURETORCLEANING & INSPECTION
1990 Mitsubishi Precis Base, Standard

Cleaning & Inspection

1990 Mitsubishi Precis Base, StandardSECTION Cleaning & Inspection
  1. Clean all parts with soft brush and solvent. Check jets for damage or clogging. Clean jets with compressed air. Do not use wire or other metal objects to clean jets.
  2. Check diaphragms for damage or cracks. Check needle valve for binding or poor seat contact. If needle valve is hard to slide, binding, or poor seat contact is suspected, replace needle valve.
  3. Check fuel inlet filter (located above needle valve) for clogging and damage. Check float operation. Check float and lever for deformation and damage. Check float chamber and main body for damage and cracks.
  4. Check operation of throttle valve, choke valve and link. If not operating properly, clean and lubricate. Check idle mixture adjusting screw for grooves, ridges, or other damage.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.