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

🔄 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

🚤 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 adjuster 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

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

📦 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