• 90508-29M12-00 Yamaha Torsion Spring | Genuine Used Part
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90508-29M12-00 Yamaha Torsion Spring | Genuine Used Part

90508-29M12-00 Yamaha Torsion Spring | Genuine Used Part

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🔧 Product Description

Genuine Yamaha Magneto / Throttle Linkage Torsion Spring - Part Number: 90508-29M12-00

A genuine Yamaha torsion spring used within the magneto-control and throttle-linkage system of selected 115HP to 200HP two-stroke outboards.

The spring applies return or preload force to the control lever so the ignition-advance and throttle linkage follows the cam correctly.

⚙️ Key Features

  • Genuine Yamaha torsion spring
  • Correct part number 90508-29M12-00
  • Used in magneto-control and accelerator linkage
  • Factory leg angles and spring rate
  • Suitable for selected V4 and V6 two-strokes
  • Maintains linkage contact and return action

🚤 Compatibility

Documented on selected

  • Yamaha 115HP V4 two-stroke outboards
  • Yamaha C115 commercial outboards
  • Yamaha 130HP V4 two-stroke applications using the related linkage
  • Yamaha 150HP V6 two-strokes
  • Yamaha 175HP V6 two-strokes
  • Yamaha 200HP V6 two-strokes
  • 1987 115ETLH
  • 1989 150ETXF
  • 1993 C115TLRR
  • 1998 115TJRW
  • Engine Type: Yamaha carburetted V4 or V6 two-stroke outboard
  • Fitment Requirement: Confirm spring position and linkage diagram

🔌 Function

The spring preloads the magneto or accelerator lever and returns it against the cam or stop. Correct tension helps synchronise ignition timing with throttle opening.

⚠️ Common Signs of Failure

  • Linkage does not return fully
  • Ignition timing advances or retards inconsistently
  • Spring is broken, stretched or corroded
  • Throttle movement feels loose
  • Spring legs no longer seat in their locating holes

🔄 Supersession & Cross Reference

OEM Supersession Chain

  • 90508-29M12-00 current documented torsion-spring reference
  • No direct supersession confirmed

OEM / Related Numbers

  • 90508-29M12-00
  • 6E5-41636-01-00 related magneto-control rod
  • 6G5-41636-01-00 related V6 magneto-control rod
  • 90501-16M12-00 related compression spring
  • 90201-08M13-00 related washer
  • 6H1-41237-00-00 related link joint
  • 6E5-41213-00-00 related accelerator cam

Aftermarket / Verified Equivalents

  • Specialist used or new-old-stock Yamaha torsion spring
  • Generic torsion spring only when wire diameter, coil diameter, leg angles and torque exactly match
  • Used complete Yamaha magneto-control linkage
  • No verified direct branded aftermarket equivalent

📦 Condition

  • Genuine used part
  • Removed from running engine where applicable
  • In good working condition unless otherwise stated
  • Compare spring shape and tension before reuse

Shipping & Delivery

Flat-rate shipping Australia-wide — $14.99 per order, no matter how many parts you add. Orders dispatch from our Kadina, South Australia store. Need it urgently or want to collect in person? Call us on 0412 532 984 before ordering.

Returns & Warranty

14-day change-of-mind returns — if it's not right or you ordered the wrong part, send it back within 14 days in the condition you received it for a refund or exchange. Full details in our Refunds & Returns policy.

Not sure this fits?

Ask us before you buy — we check part numbers and fitment every day. Call 0412 532 984 (Mon–Fri 8.30am–4.30pm) or message us through the contact page with your engine or vehicle details.

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