Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 14 - Jul 19
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
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:
- 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
4.3 ★★★★★
Based on 2398 reviews
Sort
Product Reviews
★★★★★ 4
Good watch but misadvertised with wrong color
Color: Black, Style: AE-1000W-1AVDF
So far I really like this watch but you get a different watch color than pictured. The watch is the AE-1000W-1AVDF which shows silver/grey and black, with a blue world map. You don't get that as the 1AVDF model is an all black watch with a grey world map. The watch is just as nice but not what was shown and sold as, so BEWARE.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 24, 2026
★★★★★ 5
Very nice watch for the price.
Color: Black/Gold, Style: AE-1000W-1A3VCF, Color: Black/Gold, Style: AE-1000W-1A3VCF
Very nice watch and good deal. This watch was in excellent condition and looked great after I modified it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 11, 2026
★★★★★ 5
Great Watch For the Money
Color: Black/Black, Style: AE1000W-1BVCF
I have been purchasing Casio watch products for over 25 years now. Their watches are low cost and nicely designed. I was not let down when I received this watch and all for 18 dollars. The watch is nice looking, has mostly usable features which fulfills its purpose. For a watch that costs under 20 dollars this is a great knock-around piece that can be worn in any setting. Whether hiking/climbing in the woods, fixing the car, swimming or just plain rough housing with my kids, having a low cost and functional watch that fits all my needs really makes this product a great buy.
This Casio comes with several functions:
1) You can track up to 4 different time zones. Since I do a fair amount of business travel (about 1x a month), I am constantly in different time zones. Now I can set them easily.
2) The watch has a manual DST setting which I don't mind. It's literally a push of a button.
3) It is water resistant to 10 Bar. This means swimmers, surfers, etc... can use this watch with confidence.
4) It comes with a typical alarm. I always make sure I know how to turn this off, because you know somehow some 2 or 3 year old will get it and find a way to turn on the alarm so that it wakes you and 0200 in the morning.
5) Stop watch. Not much to say here. I use it for running/walking
Cons: A couple of oddball design features that are difficult to see.
1) The upper right hand circle is actually a visual of an analogue watch, so that if you look at another time zone besides the one that you set for your home city, you can get a quick view of the time. Not so easy to see.
2) The time zone characterization is also difficult to see and not so sure it is necessary, since the back of the directions lists out the cities you can use to select the proper time zones.
So this may not be a "smart" watch which seems to be very popular these days, but I will say the price makes it very worth while. If you need a knock-around that looks nice and has the core functions you need, I think you will be very satisfied with this product. You know... maybe some things don't need to be smart. Enjoy!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 2, 2014
★★★★★ 5
It is mini computer for such a low price. My favorite. Just go for it, you will be amazed!
Color: Black, Style: AE-1000W-1AVDF
I would say this is a mini computer and I keep wondering how could they put these many functions inside this small watch and offering it for 15 dollars.I'm blown away by this wonderful product and this is my favorite watch all the time and I rarely wear my other watches.
Isn't this amazing that it got the time for close to 50 cities and I can select 4 of them in T1(Home City), T2, T3 and T4 to easily flip through using the bottom right button. This functionality helped me a lot during my 2 international trips through multiple transits. Before the departure I select all the Cities that I'm transiting through so that I can easily flip to that time zone when I land in that airport and I do not need to rely on airport clock or internet to know the time and calculating the time left for catching my connecting flight. I love this watch especially for this functionality.
While scrolling through the time zones for selection the tiny world map in the watch will blink the specific geographical area for that time zone. The capabilities of this watch does not end here, It has lot more to offer.
We can program 5 daily or one time alarms into this tiny piece. Stopwatch, Counter, 12 or 24 hour time format, Day light saving ON or OFF which simplifies the time setting when the DST switches. We can set it to signal a beep for every hour.
There is digitally displayed manual clock at the top right corner which will display your home country time stored in the T1 timezone. When I go on an international trip, I flip the digital display to local time(T2-T4) and will refer the home city time(T1) in the manual clock.
The watch is really durable, light weight, stylish, sporty, water proof, 10 years battery life and comes with a detailed instruction for setting up each and every functionality of this watch.What more can I expect for a 15 dollar watch.
My impression to buy this watch happened after seeing one my friends wearing it. I bought one for me and 3 more for giving it as gift. My friend lost it twice and bought the same watch 3rd time which proves how much he also likes it.
The last thing that I want to say is, I don't like the fancy brands which charge their customers just for the sake of their brand name or fancy packaging and offer noting more than a normal brand offers. I always prefer quality over show off so I picked this Casio watch. I really appreciate that CASIO believed in quality and functionality and not on fancy packaging.
I feel really bad that I'm writing this review after 1.5 years of my purchase and I should have done it long back. I highly recommend this watch for everyone and I'm sure you will never be disappointed.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 23, 2016
★★★★★ 5
Excellent value
Color: Green, Style: AE1000W-3AV
Nice watch typical Casio quality for a excellent price
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 4, 2026
recommand products
Two and Crew - Faith Based Jewelry & Gifts - Mama Mini Bracelet Set – Motherhood Jewelry, mom gift
19.99
DEL MONTE DICED PEACHES CUP 4 OZ 20 COUNT
14.99
LIPTON PEACH ICED TEA 16.9 OZ 24 PACK #ROCK VALUE-ORDER BY TUESDAY EVENING JUNE 30 ARRIVING JULY 08 FOR DELIVERY#
15.29
Celestial Designer iPhone 17 Case – Star Cascade | MagSafe
41.00
OCEAN SPRAY JUICE DRINK VARIETY PACK 10 OZ 18 PACK #ROCK VALUE-ORDER BY TUESDAY EVENING JUNE 30 ARRIVING JULY 08 FOR DELIVERY#
13.40