Sierra 18-5284 Tune-Up Kit for Flame Thrower Distributors 18-5477, 18-5478, 18-5479, 18-5481, 18-5482, 18-5483

The Sierra 18-5284 Tune-Up Kit is a complete ignition service kit built for Flame Thrower distributors, supplying the three wear parts that most commonly need replacement during a routine tune-up: a contact set, a condenser, and a rotor. Rather than sourcing each component separately, this kit bundles all three into one part number, simplifying maintenance for boat owners and marine technicians servicing Bosch 4 cylinder ignition systems.

The contact set (18-5305) handles the make-and-break switching that fires the ignition coil, the condenser (18-5349) suppresses arcing across the points to protect them from premature wear, and the rotor (18-5428) directs high voltage from the coil to the correct spark plug wire terminal inside the distributor cap. All three parts are engineered to match or exceed the performance of the original equipment components they replace, restoring smooth, reliable ignition timing and helping prevent misfires, hard starting, and rough idle caused by worn points, a failing condenser, or a pitted rotor.

This kit is designed to fit Flame Thrower distributors 18-5481, 18-5482, 18-5483, 18-5477, 18-5478, and 18-5479, making it a straightforward match for boats already equipped with one of these distributors. The components are finished in white plastic housings for the rotor and contact assembly, keeping the parts easy to identify during installation.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-5284
• Product Name: Tune Up Kit
• Engine Application: Bosch 4 cylinder
• Kit Contents: Contact Set (18-5305), Condenser (18-5349), Rotor (18-5428)
• Color: White
• Material: Plastic
• Contact Material: Copper
• Weight: 0.13 pounds
• UPC: 808282105822

Fitment

• Flame Thrower Distributors: 18-5481, 18-5482, 18-5483, 18-5477, 18-5478, 18-5479

Replaces (OEM)

• 243799 (contact set)
• 1306169 (contact set)
• 243460 (contact set)
• 841262 (condenser)
• 243903 (rotor)

Frequently Asked Questions

What is included in the Sierra 18-5284 Tune-Up Kit? The kit contains three components: an 18-5305 contact set, an 18-5349 condenser, and an 18-5428 rotor, covering the main wear parts needed for a distributor tune-up.

Which distributors does the 18-5284 kit fit? It is designed to fit Flame Thrower distributors 18-5481, 18-5482, 18-5483, 18-5477, 18-5478, and 18-5479.

What OEM part numbers does this kit replace? The 18-5284 kit's contact set replaces OEM numbers 243799, 1306169, and 243460, the condenser replaces OEM number 841262, and the rotor replaces OEM number 243903.

Is the Sierra 18-5284 kit compatible with 4 cylinder Bosch ignition systems? Yes, this tune-up kit is built for Bosch 4 cylinder engine applications.

How much does the 18-5284 Tune-Up Kit weigh? The complete kit weighs 0.13 pounds.

What color are the components in the 18-5284 kit? The rotor and related plastic components in this kit are white.

What material is the rotor made from? The rotor housing is made from plastic, with copper used for the contact material in the contact set.

Do I need to replace all three parts in the kit at once? The 18-5284 kit is sold as a complete set with the contact set, condenser, and rotor bundled together for a full distributor service, rather than as individually purchasable pieces.

Does the Sierra 18-5284 meet original equipment performance standards? Sierra states this tune-up kit's components meet or exceed the performance of the original equipment parts they replace.

Can I use the 18-5284 kit for a routine ignition tune-up? Yes, this kit is intended for routine maintenance, supplying fresh points, condenser, and rotor to restore reliable ignition performance in Flame Thrower distributors.