Reference

SureFly Magnetos

• Can I replace both my magnetos with SIM’s?

  Yes! FAA STC was issued in July, 2023.

• Can I use automotive spark plugs with a SIM?

  The SIM is compatible with all automotive and aviation spark plugs. SureFly’s FAA STC’s do not grant permission to use automotive spark plugs in FAA certified engines. You may only use spark plugs FAA-approved for your application.

• Does the SIM output a tachometer signal?

  The SIM outputs a 60Vdc spike with a 10Vdc offset on the p-lead (2 pulses per rev for 4 cylinder models & 3 pulses per rev for 6 cylinder models).

• How is the SIM turned off?

  The SIM is turned on and off with the existing ignition switch through the p-lead wire connected to the p-lead terminal of the SIM.

• Should I replace the impulse or non-impulse magneto with a SIM?

  SureFly recommends replacing the impulse coupled magneto. This is to reduce the possibility of impulse coupler mechanical failure and also to help the engine start better.

• What are the advantages of a SIM configured for fixed timing over a magneto?

  The SIM is a solid-state ignition module with the benefit of improved reliability and zero maintenance (no rebuilds & no overhauls) over the lifetime of the SIM. Another benefit is improved starting.

• What does it weigh?

  SIM4P - 4.4 lbs.

  SIM4N - 4.0 lbs.

  SIM6C - 5.0 lbs.

  SIM6L - 5.2 lbs.

• What is the service life of a SIM?

  Return the SIM to SureFly for evaluation after 2400 hors of SIM operation.

• What's in the box?

  1. SureFly Ignition Module (SIM)
  2. Power wire harness (84" long 14ga. wire with inline fuse holder, 10A fuse & ring terminals) If your battery is located in the tail of your aircraft, you will need to purchase a longer power wire.
  3. Manifold pressure hose (36" long 1/8"ID x 1/4"OD high temp. rubber hose)
  4. Engine STC paperwork
  5. Airframe STC paperwork

• Will the SIM help my engine start?

  Absolutely! Compared to a magneto, the SIM provides a more accurately retarded spark and a more consistent, higher energy spark at low engine RPM. Hot-starts are greatly aided by the installation of a SIM, but keep in mind SureFly can’t remedy fuel system shortcomings!