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O.S. FSa-155-P Four Cycle Engine with Pump System

Model No.: OS-35430

Price: US$479.90

Availability: This product is currently SOLD OUT
Order quantity:
Out of Stock


O.S. FSa-155-P Four Cycle Engine with Pump System for Airplane


  • Ideal for 120 size scale and sport models and aerobatic models requiring stable power and linear throttle response
  • PD-08 pump and 70R carburetor integrated with regulator ensures stable fuel delivery regardless of model attitude and fuel level
  • F-6020 three piece design muffler with center heatsink
  • New internal lubricating system eliminates breather tubing from the crankcase 

Package Included:
FSa-155-P Four Cycle Engine with PD-08 Pump System
70R Carburetor F-6020 Muffler
Header Pipe
Type F Glow Plug
Needle Valve
Extension Cable
Instruction Manual


  • Displacement: 1.548 cu in (25.36cc)
  • Bore: 1.323" (33.6mm)
  • Stroke: 1.126" (28.6mm)
  • Practical RPM: 2,000 - 10,000 RPM
  • Power Output: 2.6hp @ 10,000 RPM
  • Engine Weight: 28.40 oz (805g)
  • Muffler Weight: 3.35oz (95g)
  • Carburetor Settings:
  • Needle Valve: 2-1/2 - 3 turns from fully closed
  • Mixture Control Valve: Factory set, make only small adjustments if needed, after adjusting needle valve as described in manual, turn 30° to lean idle mixture or 90° counterclockwise to richen mixture then back again 45° clockwise
  • Width at Mounting Tabs: 2.6" 67mm)
  • Crankcase Width below Mounting Tabs: 1.8" (47mm)
  • Length from Drive Washer to rear of Carburetor: 5" (127.5mm)
  • Height from Mounting Tab to Pushrod Cover: 4.5" (114mm)
  • Height from bottom of Crankcase to Pushrod Cover: 5.4" (138.6mm)
  • Distance between Mounting Hole Centers Same Side: 0.98" (25mm)
  • Distance between Mounting Hole Centers Opposite Side: 2.3" (58mm)
  • Distance/front Mounting Hole Center to Drive Washer: 2.5" (64.5mm)
  • Distance/ Center of Engine to Drive Washer: 3.03" (77mm) Crankshaft Size: 5/16-24 

Glow fuel with 5-20% nitro content and no less than 18% lubricant content
Propeller: 16x8-12 or 17x8-12
Glow Starter
Field equipment

Code No. 35430

We have full range of O.S. products, if you cannot find your desired product(s) in our online store, please send request to [email protected].

This product was added to our catalog on Wednesday, 23. February 2011.
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