Webb WER21HW, Operator'S Manual And Parts List

15

TROUBLE SHOOTING 

ENGINE WILL NOT START 

Possible Cause 

Correction 

Out of fuel. 

Refuel. 

1. Check fuel. 

Bad fuel: engine stored without 

draining petrol, or refuelled with 

bad petrol 

Drain the fuel tank and carburettor 

(p.14). Refuel with fresh petrol. 

Spark plug faulty, fouled, or 

improperly gapped. 

Replace the spark plug (p.13). 

2. Remove and inspect the spark 

plug. 

Spark plug wet with fuel (flooded 

engine). 

Dry and reinstall spark plug. 

3. Take the engine to an 

authorised service dealer, or refer 

to the engine manual. 

Fuel filter clogged, carburettor 

malfunction, ignition 

malfunction, valves stuck, etc. 

Replace or repair faulty components 

as necessary. 

ENGINE LACKS POWER  Possible Cause 

Correction 

1.Check the air cleaner 

Air cleaner elements clogged. 

Clean or replace air cleaner elements (p.13). 

2. Check the fuel 

Bad fuel; engine stored without draining 

petrol, or refuelled with bad petrol. 

Drain the fuel tank and carburettor (p.14). 

Refuel with fresh petrol. 

3. Take the engine to an 

authorised service dealer, or 

refer to the engine manual. 

Fuel filter clogged, carburettor 

malfunction, ignition malfunction, valves 

stuck, etc. 

Replace or repair faulty components as 

necessary. 

Tune up Specifications 

ITEM SPECIFICATION 

MAINTENANCE 

Spark plug gap 

0.028-0.031in (0.7-0.8 mm) 

Refer to page 13. 

Valve clearance (cold) 

IN:0.06±0.02mm 

EX;0.08±0.02mm 

See your authorised dealer 

Other specifications 

No other adjustments needed. 

STORAGE 

The same petrol must not remain in the tank for more than one month.   

Thoroughly clean the mower and store it in a dry place.