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Ignition coil
Air, Fuel, Ignition
System Drive belt
maintenance
Maintenance & Repair
Instructions for inspecting:
1) Remove flame sensor bracket
Flame sensor bracket
2) Following normal starting procedure with burner and thermostat off. With unit
running look through flame sensor sight glass to observe if there is a spark
Instructions for setting Gap:
1) Disconnect engine spark plug wire.
2) Remove Belt guard.
3) Check gap between pickup arm and magnet to determine if adjustment is
needed.
4) If adjustment is needed loosen mount bolts using 9/64 allen wrench.
5) Place a .01" non-magnetic feeler gauge between the ignition coil pickup arm and
flywheel to set the air gap. (you may need to partially tighten mount bolts so
ignition coil holds its position when setting gap.)
6) Re-tighten mount bolts, torque to 19.5 in-lbs
7) Recheck gap. repeat steps 5 & 6 if needed
8) Slowly pull recoil to rotate flywheel a few revolutions and confirm clearance
with flywheel and magnet
9) Replace Guarding and reconnect spark plug.
Check drive belt tension after first 24 hours of running and then
routinely with each oil change. Tighten or replace belt as needed. Always
tighten belt if slipping.
WARNING:
Belt slippage can cause static electricity build-up, which may
result in sparking. Fire ignition can result.
Instructions:
1) Make sure engine is off and spark plug wire is removed.
2) Remove belt guard. See "Parts Breakdown" section of this manual for
location.
3) Inspect belt for wear/damage. Replace as needed.
4) Loosen Tension Bracket mounting bolts (3) and lower Fuel Pump mount
bolt (1) just enough to allow tension bracket to slide. See Figure A &B.
To tension the belt, tighten the tension nut shown in Figure C. This will
5)
slide the tension bracket toward the heat exchanger and tighten the belt.
The Air, Fuel, Ignition drive system requires very little tension to
perform optimally, Do not over tension. Typically, an 1/8 inch of
adjustment is adequate for re-tensioning a belt that was slipping. See
further guidelines Below.
Fig157114-4
48
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