SKU: 54356825754

O.S. Engines FS-91SII Needle Assembly 86 8H OSM27681900

Sale price$21.55 Regular price$23.95
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Description

O.S. Engines FS-91SII Needle Assembly 86 8H OSM27681900The O. S. Engines OSM27681900 FS 91SII Needle Assembly is a replacement carburettor needle assembly designed for the O. S. FS 91SII model aircraft engine, ideal for restoring fuel mixture adjustment during engine servicing or repair. Features Genuine O. S. Engine Spare: Replacement needle assembly for compatible O. S. model aircraft engines FS 91SII Fitment: Intended for the O. S. FS 91SII four stroke glow engine Carburettor Service Part: Helps

The O.S. Engines OSM27681900 FS-91SII Needle Assembly is a replacement carburettor needle assembly designed for the O.S. FS-91SII model aircraft engine, ideal for restoring fuel mixture adjustment during engine servicing or repair.

Features

  • Genuine O.S. Engine Spare: Replacement needle assembly for compatible O.S. model aircraft engines
  • FS-91SII Fitment: Intended for the O.S. FS-91SII four-stroke glow engine
  • Carburettor Service Part: Helps restore fuel mixture adjustment when the original needle assembly is worn, damaged, or missing
  • Needle Assembly Reference: Listed as #86 / #8H for applicable O.S. carburettor setups
  • Useful Engine Repair Part: Suitable for maintenance, rebuilds, and tuning repairs on compatible O.S. engines

Specifications

  • Brand: O.S. Engines
  • Part Number: OSM27681900
  • Product Type: Needle assembly
  • Part Reference: #86 / #8H
  • Vehicle Type: RC aircraft
  • Application: Glow / nitro model aircraft engine carburettor
  • Primary Compatibility: O.S. FS-91SII
  • Intended Use: Carburettor fuel mixture adjustment repair and replacement

Includes

  • 1 x O.S. Engines FS-91SII needle assembly

FAQ

What engine does the O.S. OSM27681900 needle assembly fit? The O.S. OSM27681900 needle assembly is intended for the O.S. FS-91SII model aircraft engine.

What does this part replace? This part replaces the carburettor needle assembly used for fuel mixture adjustment on compatible O.S. engine carburettors.

Is this a complete carburettor? No. This listing is for one needle assembly only. The full carburettor, carburettor body, rotor, throttle lever, gaskets, fuel line, and engine are not included.

When should a needle assembly be replaced? Replace it if the needle is bent, damaged, seized, worn, leaking, missing, or no longer allows reliable mixture adjustment.

Important Notes

  • Confirm your exact O.S. engine model and carburettor parts diagram before ordering, as similar O.S. needle assemblies can differ in fitment.
  • This listing is for one needle assembly only. Other carburettor and engine components are not included unless supplied in the original manufacturer pack.
  • After installation, reset and tune the engine mixture carefully before running at full power.
  • Check for fuel leaks, smooth needle adjustment, secure fitment, and correct fuel line condition before operating the engine.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 54356825754

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Joseph Kinlin
Fort Morgan, US
★★★★★ 5
Great watch for the money
Color: Black/Silver
Poor man's Rolex. Durable and dependable.
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Reviewed in the United States on May 1, 2026
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JK41
Belleville, US
★★★★★ 3
I love this watch even though it has some really big flaws.
Color: Tan
I love this watch even though there are some major problems. The quality of the crystal is really clear. I love the way the dial looks. It is very easy to read analog hands. It has a lot of lume on the hands so reading the time at night is not a problem even without the illumination. The indices do not glow as bright but can be easily seen when you hit the light button. I like the colors on the dial as well. I do find the digital dispay to be small and obstructed by the light button. The digital display is also unreadable when you look straight on. It just appears black until you look at it at an angle. The worst part is that the light does not even illuminate the digital display. It is not a deal breaker for me as I don't play on using the digital functions when it is dark. Honestly, I probably am not going to be using the other functions other than time. Setting the analog time is annoying as you have to hold the button and wait until you get to the respective time and it only moves forward. Overall nice looking watch that seems well built. If you use the digital functions a lot this is probably not the watch for you.
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Reviewed in the United States on January 28, 2026
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Darlene
Waukegan, US
★★★★★ 5
Great watch
Color: Tan
Bought as a gift, they love it
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Reviewed in the United States on April 3, 2026
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KO
Port Orchard, US
★★★★★ 5
Nice
Color: Black/Green
Nice
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Reviewed in the United States on May 19, 2026
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Felicia Marie
San Leandro, US
★★★★★ 5
Durable
Style: Bi-fold
My man loves it. He works construction and it has held up well so far. Carhartt does good work. Looks exactly like the picture, well made.
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Reviewed in the United States on April 19, 2026

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