Description
Contact us by E-mail (e-mail for quickest reply) or by Phone: (810) 765-0820 with any questions.
HewTech Electronics is offering A POLARFIRE Replacement FIREPLUG CDI for the 73~78 Ski-Doo & Moto-Ski’s ignitions.
The CDI redesign using the single-coil was the result of issues found on 77/78 models. We’ve determined the cause and changed the CDI design to cover all PolarFire years from 73-78 models. We also took the opportunity to integrate a single-coil design which increased the quality as well as the spark energy output!
The Single-Coil model includes 2 spark plug wires (plug wires can go to either cylinder).
CDI mounts in original factory location using original factory connector.
No splicing, alternate mounting or re-wiring necessary.
FIREPLUG Includes a separate Kill-Switch wire (BLACK/WHITE) for common 2-wire tether switch connection (ground the wire through tether or kill-sw to stop spark). This wire can be left hanging loose (no connection) if using the original 3-wire kill-switch or key-switch. No additional wiring is necessary.
NOTE: Suggest using resistor BR8ES-BR9ES spark plugs. This will extend the life of the coil, also some Digital tach’s require the use of a BR-resistor plugs to eliminate erratic display operation due to EMI interference.
POLARFIREPLUG CDI AVAILABLE FOR 73~78 ROTAX:
- 1973~1975 TNT-F/A & 75 Everest
- 1975 RV245
- 1976 RV250 & RV340 (RV345)
- 1977 RV340
- 1978 RV/Sonic models that use PolarFire CDI
BEST WARRANTY IN THE INDUSTRY!
Uses original Factory 3-wire AND/OR attach any standard 2-wire kill-switch!
TECHNICAL PROBLEMS
STILL NO-SPARK?
Verify that the chassis to engine (bonding) wire is connected & in good condition. Without this wire connection, the FIREPLUG CDI may not spark or operate correctly. Coil requires chassis/engine being grounded together.
NOTE: The stock CDI may operate without this bonding wire, since it uses the aluminum case as a common ground. The FIREPLUG CDI case is isolated and no current passes through it, therefore the wire to connect the Chassis to Engine is necessary.
The Brown wire from the connector grounds to the engine crankcase internally at the stator plate. This wire often times breaks or corrodes over time. Verify your brown-wire does connect to engine ground coming from your engine, through the harness to the CDI.
Disconnect kill-switch harness, often times the kill switch & key-switch fail & short out the CDI box.
Verify Stator & Trigger resistance:
315-335 ohm Stator (RED to Brown)
50~60-ohm triggers (striped wires).
