Triumph TR3 - Ignition Leads; Sparking Plugs; TDC Indication

RUNNING ADJUSTMENTS
Fig. 25. Ignition leads.
To obtain TDC rotate the
crankshaft until the inlet
valve of No. 1 cylinder is
open then slowly turn the
crankshaft until the small
hole in the crankshaft belt
pulley aligns with the
ti ming cover pointer (Fig.
26).
Sparking Plugs
It is important that the correct type of sparking plugs are fitted when making
replacements, and that the electrode gaps are set to 0.025" (0.65 mm.).
For normal road work use ... LODGE, CNY
For high-speed touring use
... LODGE, HN
For competition work use
... LODGE, 2HN
In certain cases when a lower compression ratio is used due to the non-
availability of high octane fuel, it may be necessary to use softer plugs,
i.e. ,
Lodge CN.
Incorrect gap settings may cause misfiring or erratic slow running.
Clean
and adjust the sparking plugs at 3,000 miles (5,000 km.). Renew all sparking
plugs at 12,000 miles (20,000 km.).
Fig. 26.
TDC indication.
32