Description
Mercury 896329821 Spark Plug L77JC4
The Mercury 896329821 spark plug is a genuine Mercury replacement spark plug listed as Champion L77JC4. It is used for OMC Stern Drive/Cobra spark plug applications where L77JC4 / OMC 386941 is specified.
Key Features
- Genuine Mercury replacement spark plug
- Mercury part number 896329821
- Champion plug number L77JC4
- OMC reference part number 386941
- Package quantity: 1
- Listed for OMC Stern Drive/Cobra spark plug service where specified
Applications
- Make: OMC
- Engine Style: Inboard/IO
- Application: OMC Stern Drive/Cobra applications using L77JC4 spark plugs
- Service Use: Routine ignition maintenance and spark plug replacement
Key Details
- Brand: Mercury
- Part Number: 896329821
- Champion Plug: L77JC4
- OMC Reference: 386941
- Product Type: Spark Plug
- Specifics: Standard Spark Plugs
- Sold As: One spark plug
When to Replace Spark Plugs
Spark plugs should be inspected and replaced according to the engine maintenance schedule. Worn or fouled plugs can contribute to hard starting, rough idle, misfire, weak acceleration, and reduced ignition performance.
Installation Notes
- Confirm the correct spark plug number before installation.
- Check and set the spark plug gap according to the service manual or engine decal.
- Install using the proper torque specification for the engine.
- For multi-cylinder engines, replacing the complete set during service is often recommended.
Fitment Reminder
Please verify fitment by Mercury part number, Champion plug code, OMC reference number, engine model, and service information before ordering. If your manual or parts diagram calls for a different spark plug, use that specified part number instead.
Frequently Asked Questions
What is Mercury 896329821?
Mercury 896329821 is a genuine Mercury spark plug listed as Champion L77JC4.
What does this spark plug cross-reference to?
This listing references OMC part number 386941 for applications where L77JC4 is specified.
Is this listing for one spark plug?
Yes. This product is sold individually as one spark plug.
What engine style is this used with?
This product is set up for Inboard/IO use based on the OMC Stern Drive/Cobra application.
Should I check the gap before installing it?
Yes. Always check and set the spark plug gap according to the service manual or engine decal before installation.
How should I confirm fitment?
Confirm fitment using Mercury part number 896329821, Champion plug code L77JC4, OMC reference 386941, your engine model, and your service documentation.