Sierra 18-5260 Marine Tune-Up Kit, Replaces OMC 173829, for 3.8L and 305/350/454 Prestolite-Equipped Engines

The Sierra 18-5260 Marine Tune-Up Kit is an ignition tune-up part engineered for marine engines fitted with a Prestolite distributor. It is built to meet or exceed the original equipment part it replaces and is designed as a direct cross to OMC 173829, with additional interchange to GLM, Evinrude/Johnson, and Mallory numbers. The kit carries a machined exterior finish and is manufactured to Sierra's standard fit and function tolerances for reliable ignition system performance.

This part corresponds to Prestolite distributor applications IBM-7014A (6 cylinder, 3.8L engine, model years 1984-88), IBM-7011 (8 cylinder, 305, 350, and 454 cid engines, model years 1976-82), and IBM-7013 (8 cylinder, 305, 350, and 454 cid engines, model years 1983-88). These distributor setups are also associated with related Sierra ignition components including contact set 18-5303, condenser 18-5345, rotor 18-5403, and distributor cap (18-5352 or 18-5353 depending on engine application). Buyers can also cross-check this part against OMC Sterndrive/Cobra Stern Drive applications using a Prestolite 8-cylinder distributor. All Sierra parts, including the 18-5260, are covered under Sierra's customer satisfaction warranty.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-5260
• UPC: 030999318657
• Product Type: Ignition Tune-Up Kit
• Compatible Distributor Numbers: Prestolite IBM-7014A, IBM-7011, IBM-7013
• Engine Fitment: 6 Cyl. 3.8L Engine (1984-88); 8 Cyl. 305, 350, 454 Engine (1976-82 and 1983-88)
• Companion Distributor Components: Contact Set 18-5303, Condenser 18-5345, Rotor 18-5403, Distributor Cap 18-5352/18-5353
• OEM Cross Reference: OMC 173829
• Interchangeable With: GLM 72650, Evinrude/Johnson 173829, Evinrude/Johnson 987926, Mallory 9-29304, Mallory 9-29309, OMC 987926
• Weight: 0.16 pounds
• Dimensions: 0.39 x 0.39 x 0.39 inches
• Exterior Finish: Machined

Fitment

• 6 Cyl. 3.8L Engine, Prestolite Distributor IBM-7014A, model years 1984-88
• 8 Cyl. 305, 350, 454 Engine, Prestolite Distributor IBM-7011, model years 1976-82
• 8 Cyl. 305, 350, 454 Engine, Prestolite Distributor IBM-7013, model years 1983-88
• OMC Sterndrive/Cobra Stern Drive applications using a Prestolite 8 cylinder distributor

Replaces (OEM)

• OMC 173829
• OMC 987926
• Evinrude/Johnson 173829
• Evinrude/Johnson 987926
• GLM 72650
• Mallory 9-29304
• Mallory 9-29309

Frequently Asked Questions

What engines does the Sierra 18-5260 tune-up kit fit? The Sierra 18-5260 fits 6 cylinder 3.8L engines from model years 1984-88 using a Prestolite IBM-7014A distributor, and 8 cylinder 305, 350, and 454 cid engines from model years 1976-82 (IBM-7011 distributor) and 1983-88 (IBM-7013 distributor).

Is the 18-5260 a direct replacement for OMC 173829? Yes, the Sierra 18-5260 is designed as a direct cross-reference to OMC part number 173829.

Does the 18-5260 kit work with Evinrude/Johnson and Mallory ignition parts? It interchanges with Evinrude/Johnson 173829 and 987926, Mallory 9-29304 and 9-29309, GLM 72650, and OMC 987926, in addition to OMC 173829.

How much does the Sierra 18-5260 tune-up kit weigh? The Sierra 18-5260 weighs 0.16 pounds.

What are the dimensions of the 18-5260? The Sierra 18-5260 measures 0.39 x 0.39 x 0.39 inches.

Will the 18-5260 fit an OMC Sterndrive or Cobra Stern Drive? It is compatible with OMC Sterndrive/Cobra Stern Drive setups that use a Prestolite 8 cylinder distributor.

What finish does the Sierra 18-5260 have? The 18-5260 has a machined exterior finish.

Is the Sierra 18-5260 genuine Sierra or aftermarket? The 18-5260 is a genuine Sierra part, manufactured to meet or exceed the original equipment part it replaces.

What distributor number is the 18-5260 tune-up kit paired with? Depending on the engine, the 18-5260 corresponds to Prestolite distributor IBM-7014A, IBM-7011, or IBM-7013.

Are there related ignition components that go with the 18-5260? For the same distributor applications, Sierra also lists contact set 18-5303, condenser 18-5345, rotor 18-5403, and distributor cap 18-5352 or 18-5353.

Is the Sierra 18-5260 covered by a warranty? Yes, the Sierra 18-5260 is covered under Sierra's customer satisfaction warranty like all Sierra parts.

Does the 18-5260 fit 4 cylinder engines? No, the 18-5260 tune-up kit fitment covers 6 cylinder 3.8L and 8 cylinder 305/350/454 engines using the listed Prestolite distributors.