EXCESSIVE FUEL CONSUMPTION
Possible Cause Operation
Air filter obstructed or dirty. Dismantle the sponge, wash with water and shampoo, then
soak it in a mixture of 50% petrol and 50% Selenia Air Filter Oil,
then allow to drip dry. Wring out water manually without
squeezing and reassemble
The starter remains on Check that the starter runs correctly and it is properly powered
Loose nozzles Check the maximum and minimum nozzles are adequately
fixed in their fittings
Incorrect float level Restore the correct level in the chamber (the float must be par-
allel to the upper cover contact plane, that is the throttle valve
membrane cover)
FAULTY CLUTCH
Possible Cause Operation
Tear or irregular functioning Check that there is no grease on the masses. Check that the
clutch masses' contact surface with the clutch bell is mainly in
the middle with equivalent specifications on the three masses.
Check that the clutch bell is not scored or worn abnormally
This section makes it possible to find the solutions to use in troubleshooting.
For each breakdown, a list of the possible causes and respective interventions is given.
Engine
Poor performance
LOW COMPRESSION
Possible Cause
Operation
Wrong valve adjustment Adjust the valve clearance properly
incorrect valve sealing Remove the head and the valves, grind the seats, descale the
valve heads and, if necessary, replace any faulty part.
Valve seat distorted Replace the head assembly
Worn or broken cylinder or piston rings Replace the piston cylinder assembly or the piston rings
POOR PERFORMANCE
Possible Cause
Operation
The carburettor is dirty; vacuum operated cock failure Dismantle, wash with solvent and dry with compressed air or
replace
Excess of scales in the combustion chamber Descale the cylinder, the piston, the head and the valves
Incorrect timing or worn timing system elements Time the system again or replace the worn parts
Muffler obstructed Replace
Automatic starter failure Check: mechanical movement, electric connection and fuel
supply, replace if required.
Oil level exceeds maximum Check for causes and fill to reach the correct level
Lack of compression: parts, cylinder and valves worn Replace the worn parts
Driving belt worn Replace
Inefficient automatic transmission Check the rollers and the pulley movement, replace the dam-
aged parts and lubricate the driven pulley moveable guide with
Montblanc Molybdenum Grease
Clutch slipping Check the clutch system and/or the bell and replace if neces-
sary
Overheated valves Remove the head and the valves, grind or replace the valves
Wrong valve adjustment Adjust the valve clearance properly
Valve seat distorted Replace the head unit
MSS ZIP 100 4T Troubleshooting
TROUBL - 39
To Next Page
Loading...
Need help?
General