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Hand grip heater on model 346XPG,
351G, 353G – removal
No heating or heating only in front hand grip
• Front hand grip – troubleshooting
1
Remove the three bolts that secure the cover over
the front hand grip. Disconnect the leads from the
switch and generator and measure the resistance of
the hand grip heater, which should be 3–4 ohm.
Replace the front hand grip if the resistance is higher.
2
Reconnect the leads and refit the cover.
3
Push the switch back into place and reconnect the
leads.
4
Bolt the cover back onto the hand grip.
• Generator – troubleshooting
1
Remove the cylinder cover and cover from the
front hand grip. Disconnect the black lead from the
generator and connect a multimeter between it and
a clean area on the cylinder. The multimeter should
show a resistance of 0.9–1.3 ohm. If the reading is
higher or lower, replace the generator, see “Re-
placing the generator”.
2
Reconnect the lead and refit the hand grip cover
and cylinder cover.
• Switch – troubleshooting
1
Carefully free the switch and frame from the front
hand grip using a screwdriver.
2
Disconnect the leads from the switch and connect
a multimeter to it. The meter should read over
1000 ohm when the switch is in the “0” position.
The meter should read no higher than 0.1 ohm with
the switch in the “1” position. Replace the meter if
the readings are outside these limits.
Rear hand grip heater not working
• Rear hand grip heater – troubleshooting
1
Remove the cylinder cover, air filter and cover from
the rear hand grip.
2
Disconnect the red lead from the heater and
connect a multimeter between it and the black
earth lead that is bolted to the bottom of the
carburettor on the clutch side of the saw. The
meter should read 0.7–1.2 ohm. If the reading is
higher replace the heater element.
3
Remove the air filter, throttle pushrod, rubber
diaphragm and carburettor, see “Carburettor –
removal”.
4
Remove the bolt from the plate at the base of the
carburettor to release the lead for the heater
element.
5
Repair instructions
Unscrew the three bolts from the front hand grip
and remove the cover to reveal the leads. Discon-
nect the red lead.