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Radiator


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Complai nt Symptom and possible causes Remedy
Engine overheats. 1. Not enough cool i ng water. 2. Rad iator core is clogged with d i rt or trashes. 3. E rratic thermostat, stuck i n closed position. 4. Fau l ty cool i ng fan. 5. Defective thermo-switch. 6. Clogged water passage. 7. Ai r trapped i n the cool i ng ci rcu it. 8. Def ective water pu mp. 9. Use i ncorrect coolant. Add coola nt. Clean. R eplace. R epai r or replace. R eplace. Clea n. Bleed out ai r. Replace. R eplace.
Engine overcools. 1. Erratic thermostat, stuck i n f u l l-open position. 2. Def ective thermo-switch. 3. Extremely cold weather. R eplace. Replace. Put on the  
 

 
rad iator cover.


 

CARBURETOR

 

  Complaint   Symptom and possible causes   Remedy
Trouble with starting. 1. Starter jet is clogged. 2. Starter pipe is clogged. 3. Ai r lea k i ng from a joint between starter body and carburetor.   4. Ai r lea k i ng from ca rbu retor's joi nt or vacu u m gauge joi nt. 5. Starter pl u nger is not operati ng prop rly. Clean. Clean. Check sta rter bod y a nd carbu retor for tightness, adjust and replace gasket. Check a nd adjust. Check a nd adjust.
Idling or low-speed trouble. 1. Pi lot jet, pi lot a i r jet are clogged or loose. 2. Ai r leaki ng from ca rbu retor's joi nt, vacu um gauge joint, orstarter. 3. Pi lot outlet or bypass is clogged. 4. Starter pl u nger is not f u l l y closed. Check a nd clean. Check a nd adjust.   Check a nd clea n. Check and adjust.
Medium-or high speed trouble. 1. Mai n jet or mai n ai r jet is clogged. 2. Needle jet is clogged. 3. Throttle val ve is not operati ng properl y.   4. F uel f i lter is clogged. Check a nd clean. Check a nd clean. Check th rottle va l ve for operation. Check a nd clea n.
Overflow and fuel level fluctuations. 1. Need le va lve is worn or damaged. 2. Spri ng i n need le val ve is broken. 3. Float is not worki ng properl y. 4. Foreign matter has ad hered to need le va lve. 5. Fuel level is too high or low. Replace. Replace. Check a nd ad just. Clean. Ad just float height.

 

 


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