Rotor Arms / Point Sets

Point Contact Breaker.
Restore reliable ignition switching and consistent engine operation with this Porsche Point Contact Breaker. Designed for compatible classic Porsche ignition systems, the contact breaker—commonly known as ignition points, contact points or breaker points—is a key mechanical component within the distributor.

Fits:

Diagram Ref No 23

In a traditional points-based ignition system, the distributor cam repeatedly opens and closes the contact breaker as the engine rotates. This switching controls current through the ignition coil. When the points open, the magnetic field in the coil collapses, generating the high voltage required to produce a spark at the spark plugs.

Because the contact surfaces open and close thousands of times during normal engine operation, they gradually wear. Electrical arcing can cause pitting or burning of the contacts, while mechanical wear can alter the points gap and ignition dwell angle.

Correctly adjusted, serviceable contact points are essential for reliable starting, smooth running and accurate ignition performance. Replacing worn points with the correct Porsche Point Contact Breaker 61660222603 helps restore dependable ignition switching and provides a sound basis for correct distributor adjustment.

What This Product Does:

• Mechanically switches the ignition coil primary circuit.
• Opens and closes as the distributor cam rotates.
• Controls the timing of ignition coil charging and discharge.
• Allows the ignition coil to generate the high voltage required for the spark plugs.
• Helps maintain the correct ignition dwell when properly adjusted.
• Supports reliable engine starting.
• Helps maintain smooth idle and consistent engine operation.
• Supports correct ignition performance throughout the engine speed range.
• Works together with the distributor, ignition coil and condenser.
• Provides a serviceable component for traditional mechanical ignition systems.
• Replaces worn, burned, pitted or incorrectly operating contact points.
• Helps maintain the original-style ignition system on compatible classic Porsche models.  

Symptoms Of Wear Or Failure:

• Difficult starting.
• Engine cranking but failing to start.
• Intermittent starting problems.
• Rough or unstable idle.
• Engine misfires.
• Hesitation during acceleration.
• Poor throttle response.
• Loss of engine power.
• Engine cutting out intermittently.
• Poor running at higher engine speeds.
• Inconsistent ignition timing.
• Excessive electrical arcing at the points.
• Burned or blackened contact surfaces.
• Pitting or material transfer between the contacts.
• Incorrect or continually changing points gap.
• Excessive wear of the rubbing block.
• Weak or inconsistent ignition spark.
• Increased fuel consumption caused by poor ignition performance.  

Why Replacement Matters:

• The contact breaker is central to the operation of a conventional mechanical ignition system. If the points cannot switch the ignition coil correctly, spark quality and ignition timing can deteriorate.
• As the contact surfaces become burned or pitted, electrical resistance can increase and switching can become less consistent. This may reduce the effectiveness of the ignition system and contribute to misfires or difficult starting.
• Mechanical wear is equally important. The rubbing block follows the distributor cam and determines when the contacts open. As this surface wears, the points gap and dwell angle can change.
• An incorrect points gap can alter ignition performance and timing. Too little or too much dwell can affect how effectively the ignition coil charges between firing events.
• Replacing worn points with a correct Porsche Point Contact Breaker 61660222603 helps restore precise mechanical switching, reliable spark generation and consistent engine performance.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

61660222603

The product you are viewing cross references to these numbers

Rocker arm shim. 0.50mm. Sol each.



Between rocker arm and rocker arm bridge. Made from High quality steel. Laser cut. 0.5 mm thickness. Outside 23.5mm inside 16 mm. Fits the steel and alloy rocker arm bridge for 356 and 912.

Fits:
Porsche 356 All

Click 'Zoom in' for large parts diagram.
Diagram ref no 17

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

53905235

The product you are viewing cross references to these numbers

Rotor Arm. Porsche 912 / 356 / 912E



Fits:
Porsche 912 1965-69
Porsche 356A / 356B / 356C
Porsche 912E

The "rotor" head is attached to the top of the distributor shaft which is driven by a gear on the engine's camshaft and thus synchronized to it. This rotor is pressed against a carbon brush on the center terminal of the distributor cap which connects to the ignition coil either through the top and wired directly to the coil in HEI systems, or via the center terminal in points ignition systems and remotely connected to the coil.

The rotor is constructed such that the center tab is electrically connected to its outer edge so that voltage coming in to the center post travels through the carbon point to the outer edge of the rotor. As the camshaft rotates, the rotor spins and its outer edge passes each of the internal plug terminals to fire each spark plug.

Please note that Porsche has discontinued their official product.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

61660222107

The product you are viewing cross references to these numbers