$25.00
The Johnson/Evinrude Armature Support Plate is used beneath the flywheel to support and properly position the armature plate assembly on select OMC outboard engines.
This support plate provides the stable mounting surface needed for the ignition timing plate to move correctly while remaining securely aligned with the crankcase.
Ideal for ignition system repair, armature plate service, restoration, and replacement of a worn, cracked, corroded, distorted, or damaged original support plate.
Ships in 5–7 days
The Johnson/Evinrude Armature Support Plate is an important part of the ignition timing support system used beneath the flywheel on select OMC outboard engines.
The support plate provides the stationary foundation for the armature plate assembly, helping keep the ignition components properly aligned while allowing the timing plate to move as throttle position changes.
A worn, bent, cracked, corroded, or damaged support plate can affect armature plate movement and may contribute to ignition timing problems, excessive looseness, or binding.
The armature support plate sits between the crankcase and the moving armature plate assembly.
Its job is to provide a secure and correctly positioned base for the ignition timing plate.
Proper support helps maintain:
The support plate must remain firmly mounted to the crankcase while also allowing the armature plate above it to move freely.
The armature plate carries or supports ignition related components beneath the flywheel.
As throttle position changes, the timing linkage moves the armature plate through its designed range.
The support plate provides the base that keeps this movement controlled and correctly aligned.
If the support plate becomes damaged or distorted, the armature plate may:
Any of these conditions can make ignition timing inconsistent.
Possible symptoms or inspection findings include:
Because similar symptoms can also be caused by worn retainers, bushings, bearings, or timing linkage, the entire assembly should be inspected during service.
Replacement should be considered when:
A damaged support plate can make it difficult to correctly set or maintain ignition timing.
The Armature Support Plate works together with related ignition support hardware, including:
When replacing the support plate, inspect all related hardware at the same time.
Damaged or corroded mounting screws should be replaced rather than reused.
The ignition timing system depends on precise movement.
If the support plate is loose, worn, or distorted, even a good armature plate may not move correctly.
Possible effects include:
Proper support helps keep the timing mechanism predictable throughout the engine’s operating range.
Whenever the armature support plate is removed, inspect:
A new support plate will not correct problems caused by stripped crankcase threads, worn retainers, or damaged timing linkage.
Before installation:
Do not overtighten the mounting hardware into aluminum engine components.
For performance and racing outboards, smooth and predictable ignition timing is especially important.
The support plate may not seem like a major performance component, but any looseness or binding in the armature plate system can affect timing consistency at higher RPM.
On SST-45 / Formula Light engines, careful inspection of the complete timing plate support system should be part of regular ignition system maintenance.
A properly installed Armature Support Plate helps keep the ignition timing assembly stable, aligned, and free to move correctly throughout the throttle range.
| Weight | 0.5 lbs |
|---|---|
| Dimensions | 4 × 4 × 4 in |
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