OS glow engine Carburettor Body OS29085100 - 61B 91HZ tuning replacement by O.S. Engine  [OS29085100]

O.S. ENGINES CARBURETTOR BODY 61B 91HZ
Price:
AUD$28.35
Brand:
O.S. Engine
Model:
OS29085100
GTIN:
4531028143272
Condition:
Brand New
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Tuning-oriented carburettor body for OS engines

This replacement carburettor body is an RC-scale accessory intended for maintenance and tuning of OS glow engines. The item matches the product identification 61B 91HZ and serves as the core housing that locates the needle valves, throttle linkage, and mounting points on compatible carburettors.

The description focuses on fitment and function rather than claiming universal compatibility; check physical match and mounting points before installation. This body is intended for hobby use on model engines and must be paired with the original carburettor components when reassembling.

Specifications

  • Item: Carburettor body 61B 91HZ
  • Material: Manufacturer unspecified
  • Model Number: OS29085100
  • Compatibility: OS engine carburettors, confirm model fitment prior to use

Use this carburettor body when restoring or servicing compatible OS carburettors, taking care to verify alignment of throttle and needle assembly during reassembly to maintain predictable engine response.

Will installing this body affect my needle settings?

Installing a correctly matched OS29085100 body should restore the original geometry, but always recheck and fine-tune high and low speed needles after the swap to account for any small differences.

Does this part help achieve crisper throttle response?

A straight, undamaged carburettor body helps maintain consistent airflow and needle positioning, which supports predictable throttle transitions when paired with correct jetting and linkage setup.

Are there tuning tips after replacement?

After fitting the 61B 91HZ body, start with the previous baseline needle settings and make incremental adjustments while observing idle, mid and top-end response to dial in performance.

Should I replace gaskets when tuning?

Yes, fresh gaskets and intact seals prevent air leaks that can upset tuning. Replace any aged gaskets during reassembly to maintain stable needle behaviour.

Is throttle linkage setup critical after fitting?

Correct linkage geometry is essential. Verify neutral, idle and full-throttle positions and adjust the throttle arm so the needle and throttle plate align as intended for consistent engine response.

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