FS155-a Alpha Series 1.55 4-Stroke Pumped Engine
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FS155-a Alpha Series 1.55 4-Stroke Pumped Engine

Item No.
OS Engines - OSMG0998
5
$659.99
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Product $659.99
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200-size power in a 120-size package!

How do you get 200-size power from a 120-size engine? O.S. calls it the FS155-a. Since the FS155-a is a pumped 4-stroke, you’ll enjoy 2.6 hp at all times, regardless of tank position, attitude or fuel level. Its novel recirculation system bathes working parts in constant lubrication, for less friction and wear!
  • Also included: F-6020 muffler, Type F glow plug & PD-08 pump.
  • The same 2.6 horsepower as many 200-size power plants — with the dimensions and weight of a 120-size engine.
  • Because it's a pumped 4-stroke, you’ll enjoy plentiful power regardless of tank position, attitude or fuel level.
  • Instead of oil venting through the crankcase, it’s re-circulated to lubricate working parts — reducing friction and wear as well as cowl cleanup.
  • Includes the 70R regulating carb for superior throttle response and precise fuel metering.
  • 2-year limited warranty.

Product Specs

Bore
1.32 in (33.6 mm)
Crankshaft Threads
UNF5/16-24
Cylinders
Single
Displacement
1.548 cu in (25.36 cc)
Engine (Only) Weight
28.4 oz (805 g)
Muffler Weight
3.35 oz (95 g)
Plug Type
Type F glow plug
Power Type
Glow
Product Height
5.4 in (138.6 mm) from bottom of crankcase to rocker cover
Product Length
5.0 in (127.5 mm) from carburetor to drive hub
Product Width
2.6 in (67 mm) at mounting tabs
Prop Range
16 x 8 - 17 x 12
RPM Range
2,000 - 10,000 rpm
Stroke
1.13 in (28.6 mm)
Total Weight
32oz (900g)

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