O.S. FSa-81 w/F-5030 Silencer

by OS Engines

Normally: £336.99

Web Price: £293.18

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Part Number: L-OS34810
Stock Status: Out Of Stock What's this Mean?
Expected: October 2nd

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The new FSa-81 is a direct replacement for the FS-70 Surpass II, offering greater power and throttle precision in a compact and lightweight design. The crankcase mounting dimensions allow the FSa-81 to slot into the same mount that an FS -70S II would for an instant power upgrade.

Like the FSa-56, the crankcase breather system has now been incorporated inside the engine to negate the need for an external vent and the excess oil that eminates from it. A propeller locknut assembly is of course standard.

The new F-5030 silencer is very effective, thanks to it's internal baffle and carefully matched internal volumes and opassages. The design allows a huge range of outlet positions to accomodate almost every model. Even the distance away from the engine can now be adjusted.

The latest 60RA carburettor now features a 'constant velocity' inlet for improved throttle response and reduced spitting.



Specification
Propeller Range: 13x7-9, 14x6-7
Silencer: F-5030
Weight: 556g 19.63oz
Displacement: 13.26cc 0.809 cu.in.
Bore: 27.7mm 1.091in.
Stroke: 22.0mm 0.866in.
Power Output: 1.3PS @ 11,000
Practical RPM: 2,200 – 12,000

L-OS34810 O.S. FSa-81 w/F-5030 Silencer
L-OS34810 O.S. FSa-81 w/F-5030 SilencerL-OS34810 O.S. FSa-81 w/F-5030 SilencerL-OS34810 O.S. FSa-81 w/F-5030 SilencerL-OS34810 O.S. FSa-81 w/F-5030 SilencerL-OS34810 O.S. FSa-81 w/F-5030 Silencer
Part No.Format
L-OS34810
Nitro 4 Stroke

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When a choice of colours is offered for a product, we will endeavor to fulfill your first request, but regret that this is not always possible and colours may vary on these items. Images are for illustration purposes only and whilst provided in good faith, may be incorrect. Prices quoted are valid for online purchases only and may be lower than those advertised in-store. E&OE. Currency conversions are given as an approximation only. All transactions will be processed in GBP. We advise you to research all part numbers before ordering to ensure compatibility with your model.