Description

The Sea-Doo 4-TEC Spark Plug Tube Seal is an essential sealing part of the ignition system of Sea-Doo 4-TEC engines. This set of 4 seals (OEM references 420851750 and 420851754) ensures a tight seal between the spark plug tube and the cylinder head, preventing oil or water from infiltrating the spark plug well. A faulty seal can cause misfires, deterioration of spark plugs, and damage to ignition coils.

Compatible with all Sea-Doo models equipped with the 4-TEC engine from 130 to 325 hp, this kit of 4 seals is ideal for a complete overhaul of the ignition system at the beginning of the season.

Technical Specifications

OEM References: 420851750 / 420851754
Type: Spark plug tube seal
Content: Set of 4 seals
Condition: New
Material: High-temperature rubber
Weight: 100 g
Regulated Substances: None
Installation: Recommended when replacing spark plugs or coils

Compatibility

Compatible with Sea-Doo models equipped with the 4-TEC engine:

GTI / GTI SE – 130 hp
GTR – 230 hp
GTX – 155 / 230 / 300 hp
GTX Limited – 300 / 325 hp
RXT / RXT-X – 260 / 300 hp
RXP-X – 300 hp
Wake / Wake Pro – 230 / 325 hp
Fish / Fish Pro – 130 / 170 hp
Explorer / Explorer Pro – 130 / 170 hp
Cruise – 130 hp

⚠️ Always check your serial number (VIN) and the original OEM reference before ordering to confirm exact compatibility with your model.

Why Replace Spark Plug Tube Seals?

Spark plug tube seals age due to heat and repeated thermal cycles. A worn or cracked seal allows water and dust to penetrate the spark plug well, which degrades spark plugs and can damage ignition coils. Common symptoms are:

Misfires or hard starting
Burning smell near the cylinder head
Fouled or faulty ignition coil

It is recommended to replace all seals systematically during each spark plug or coil replacement, at the beginning of the season or after 100 hours of navigation.