EMP Distributor Rotor 300-00530, Cross-Reference 18-5403 for GM 305/350/454 and 3.8L Marine Engines

The EMP 300-00530 is a distributor rotor built for marine inboard ignition tune-ups on GM-based engines. It mounts inside the distributor cap and rotates with the distributor shaft, directing high-voltage current from the coil to each spark plug terminal in firing order. As a tune-up wear item, the rotor is typically replaced alongside the contact set, condenser, and distributor cap to restore reliable spark delivery and smooth engine performance.

This rotor is the correct replacement for the 18-5403 position in three GM-based marine engine applications: 6-cylinder 3.8L engines using distributor No. IBM-7014A, and 8-cylinder 305, 350, and 454 cid engines using distributor No. IBM-7011 or IBM-7013. Always match the rotor to the correct distributor number for your engine to ensure proper fit and ignition timing.

Specifications

• Brand: EMP
• Manufacturer Part Number: 300-00530
• Category: Chrysler Inboard Tune Up Kit
• Component Type: Distributor Rotor
• Cross-Reference Number: 18-5403
• Cylinder Configurations: 6-cylinder, 8-cylinder
• Compatible Engines: 3.8L, 305 cid, 350 cid, 454 cid
• Compatible Distributor Numbers: IBM-7014A, IBM-7011, IBM-7013
• Weight: 0.033 pounds
• UPC: 840080402574

Fitment

• 1984-88: 6-cylinder 3.8L engines, distributor No. IBM-7014A
• 1976-82: 8-cylinder 305, 350, and 454 cid engines, distributor No. IBM-7011
• 1983-88: 8-cylinder 305, 350, and 454 cid engines, distributor No. IBM-7013

Replaces (OEM)

• 18-5403

Frequently Asked Questions

What is the EMP 300-00530 rotor used for? The EMP 300-00530 is a distributor rotor that directs high-voltage current from the ignition coil to each spark plug terminal in firing order as part of a marine inboard ignition tune-up.

Which engines does the 300-00530 rotor fit? It fits 6-cylinder 3.8L engines using distributor No. IBM-7014A, and 8-cylinder 305, 350, and 454 cid engines using distributor No. IBM-7011 or IBM-7013.

Is the EMP 300-00530 the same as rotor 18-5403? Yes, the EMP 300-00530 cross-references to rotor number 18-5403 for the listed GM-based marine engine applications.

How much does this rotor weigh? The EMP 300-00530 rotor weighs 0.033 pounds.

What is the UPC for the EMP 300-00530 rotor? The UPC for the EMP 300-00530 distributor rotor is 840080402574.

Do I need to replace other ignition parts along with this rotor? During a tune-up, the 300-00530 rotor is typically replaced together with the contact set, condenser, and distributor cap to restore reliable ignition performance.

Which distributor number should I check before ordering? Confirm your engine's distributor number matches IBM-7014A, IBM-7011, or IBM-7013 before ordering the 300-00530 rotor, since each corresponds to a specific engine application.

Does the 300-00530 rotor fit both 6-cylinder and 8-cylinder engines? Yes, the same 300-00530 rotor is used across 6-cylinder 3.8L engines and 8-cylinder 305, 350, and 454 cid engines, provided the distributor number matches.

Is this rotor for a Chrysler marine engine? The EMP 300-00530 rotor is cataloged under Chrysler inboard tune-up parts and fits the GM-based 3.8L, 305, 350, and 454 cid engine distributors listed for these applications.

Can I use the 300-00530 rotor for 305, 350, and 454 cid engines interchangeably? Yes, the same 300-00530 rotor applies to 305, 350, and 454 cid 8-cylinder engines as long as the distributor number is IBM-7011 or IBM-7013.