12831-90J02 Suzuki Timing Chain Adjuster | Genuine Used Part

🔧 Product Description

Genuine Used Suzuki Automatic Timing Chain Tensioner Adjuster - Part Number: 12831-90J02

A genuine pre-owned Suzuki Marine automatic timing-chain adjuster used across selected four-stroke outboard timing systems.

The adjuster applies controlled force to the timing-chain tensioner, automatically taking up chain slack as the timing components wear and as engine temperature changes.

⚙️ Key Features

• Genuine Suzuki Marine used adjuster assembly
• Current OEM part number 12831-90J02
• Supersedes several earlier Suzuki adjuster references
• Automatic timing-chain slack compensation
• Used on selected DF40 / DF50 and DF90 / DF100 / DF115 / DF140 engines
• Original ratcheting or spring-loaded adjuster configuration

🚤 Compatibility

Commonly used on selected

• Suzuki DF40
• Suzuki DF50
• Suzuki DF90
• Suzuki DF100
• Suzuki DF115
• Suzuki DF140
• Suzuki-built Johnson four-stroke equivalents where the Suzuki number is specified

Representative production applications

• Selected DF40 / DF50 engines from the late 1990s through 2010
• Selected DF90 / DF100 / DF115 / DF140 engines from the early 2000s through the early 2010s
• Application is controlled by model year, engine suffix and starting VIN

Important fitment note

• This adjuster is used across multiple timing-chain layouts.
• Confirm the exact engine diagram and tensioner arm.
• Do not release or extend the adjuster before the timing components are correctly positioned.
• Some service procedures require the adjuster to be reset, locked or primed before installation.

🔌 Function

The automatic adjuster maintains pressure against the timing-chain tensioner.

Its internal spring and locking mechanism compensate for normal chain wear and prevent the chain from becoming loose during operation.

⚠️ Common Signs of Failure

• Timing-chain rattle during start-up
• Persistent chain noise
• Adjuster plunger does not extend
• Plunger will not lock
• Oil leakage from the adjuster
• Timing chain becomes loose
• Cam timing shifts
• Difficult starting or reduced power
• Internal ratchet mechanism sticks

🛠️ Service Notes

Recommended checks before installation

• Confirm the supersession and engine model
• Inspect the plunger for scoring
• Test the locking mechanism
• Reset the adjuster according to the service manual
• Inspect the timing chain, guides and tensioner arm
• Align all timing marks
• Rotate the crankshaft manually before starting
• Confirm the adjuster has released and applied chain pressure

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 12831-73G01 - Earlier adjuster assembly
• 12831-90J00 - Earlier tensioner adjuster
• 12831-90J01 - Later intermediate adjuster
• 12831-90J02 - Current service adjuster assembly

OEM / Related Numbers

• 12831-90J02
• 1283190J02
• 12831-90J02-000
• 12831-90J01
• 1283190J01
• 12831-90J00
• 1283190J00
• 12831-73G01
• 1283173G01
• OEM Description: Adjuster Assembly, Tensioner

Aftermarket / Verified Equivalents

• No aftermarket equivalent

📦 Condition

• Genuine Suzuki Marine used part
• Pre-owned internal engine component
• Oil staining and normal cosmetic wear may be present
• Mechanical operation must be checked before installation
• A new adjuster is generally preferred where service history is unknown
• Supplied in protective or equivalent packaging