Sierra Stator 18-99215 for Mercury/Mariner 6-Cylinder 40 Amp Outboards, Replaces 398-858404A3/A4/T4, Fits 2000-2007 135-240 HP

The Sierra 18-99215 is a replacement ignition stator engineered for Mercury/Mariner 6-cylinder outboard engines. The stator is a core component of the outboard's ignition charging system, generating the AC current that feeds the engine's ignition and charging circuits; a failed or weak stator can cause hard starting, intermittent misfires, loss of charging output, or a no-spark condition. This unit is built to a 40 amp output rating and is designed to replace the original stator on qualifying Mercury and Mariner 6-cylinder powerheads.

Sierra part number 18-99215 is compatible with 2000-2007 Mercury/Mariner outboard engines rated 135, 140, 150, 175, 200, and 240 HP. It directly replaces OEM stators carrying the part numbers 398-858404A3, 398-858404A4, 398-858404T4, and 4398-858404T3, allowing it to be installed as a drop-in ignition system component without modification on the applicable engines. Always cross-check your outboard's existing stator part number before ordering to confirm an exact match for your specific engine.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-99215
• Category: Mercury Outboard Ignition System
• UPC: 736983860170
• Weight: 2.5 pounds
• Compatible Engine Configuration: 6 Cylinder
• Output Rating: 40 Amp
• Compatible Horsepower: 135, 140, 150, 175, 200, 240 HP
• Compatible Years: 2000-2007
• Compatible Make: Mercury, Mariner
• OEM Cross Reference: 398-858404A3, 398-858404A4, 398-858404T4, 4398-858404T3

Fitment

• Mercury/Mariner 6-cylinder outboards, 2000-2007
• 135 HP, 140 HP, 150 HP, 175 HP, 200 HP, 240 HP

Replaces (OEM)

• 398-858404A3
• 398-858404A4
• 398-858404T4
• 4398-858404T3

Frequently Asked Questions

What engines does the Sierra 18-99215 stator fit? The Sierra 18-99215 stator fits Mercury/Mariner 6-cylinder outboard engines from 2000-2007 rated at 135, 140, 150, 175, 200, and 240 HP.

What OEM part numbers does 18-99215 replace? This stator replaces OEM Mercury/Mariner part numbers 398-858404A3, 398-858404A4, 398-858404T4, and 4398-858404T3.

What is the amp output rating of this stator? Sierra 18-99215 is rated for 40 amp output, matching the charging requirement of the 2000-2007 Mercury/Mariner 6-cylinder engines it fits.

How much does the Sierra 18-99215 stator weigh? The stator weighs 2.5 pounds.

What does a stator do on a Mercury outboard? A stator generates the AC current used by the outboard's ignition and charging system; on Mercury/Mariner 6-cylinder engines a failing stator, such as one being replaced by the Sierra 18-99215, can cause hard starting, misfires, or charging loss.

Will 18-99215 work on a 4-cylinder Mercury outboard? No, Sierra 18-99215 is built for 6-cylinder Mercury/Mariner outboards rated 135-240 HP; a 4-cylinder engine requires a different stator.

Is this stator an OEM part or aftermarket? The 18-99215 is a Sierra-branded replacement stator designed to match the fit and output of the original equipment stators it replaces (398-858404A3/A4/T4 and 4398-858404T3).

How do I know if my outboard needs a new stator? Symptoms like no spark, intermittent misfiring, hard starting, or a battery that will not charge while the Mercury/Mariner engine is running point to a failed stator, which the Sierra 18-99215 is designed to replace on 2000-2007 6-cylinder models.

Does the Sierra 18-99215 come with mounting hardware? The dossier for this listing covers the stator component itself (part number 18-99215); no additional included accessories are specified.

Can I cross-reference my old stator number to confirm 18-99215 is correct? Yes, if your existing stator is marked 398-858404A3, 398-858404A4, 398-858404T4, or 4398-858404T3, the Sierra 18-99215 is the corresponding replacement.

What year range of Mercury/Mariner engines uses this stator? The 2000 through 2007 model years of the applicable 135-240 HP 6-cylinder Mercury/Mariner outboards use this stator, part number 18-99215.

Is 18-99215 compatible with both Mercury and Mariner branded outboards? Yes, this stator is compatible with both Mercury and Mariner branded 6-cylinder outboards in the 2000-2007, 135-240 HP range.