This is the Ofna Force .32 cu in (5.2cc) Nitro Engine with Pull Starter and SG (pilot) Crankshaft.

FEATURES: Unique pull start pin design allows conversion to non-pull start by purchasing different rear engine covers- OFNG5209 52090 Backplate OFNG5633 50633 Backplate Torque Start 50010 Backplate Force/Picco Shaft Start ABC cylinder & piston set-"A"luminum piston,"B"rass cylinder liner with "C"hrome plating on the cylinder Improved porting for higher torque and RPM power Competition slide valve carburetor Oversized cylinder head for efficient cooling, gun metal gray in color

INCLUDES: Ofna Force .32 cu in (5.2cc) Pull Start Nitro Engine with instruction sheet, rubber exhaust gasket, collet and 3x6mm socket head screw to hold clutch assembly to crankshaft

REQUIRES: Fuel: Car fuel with 20% nitro content, Glow Plug: Long, without idle bar, OSMG2693

SPECS: Displacement: .32 cu in (5.2cc) Exhaust: Rear Bore: 19.5mm Stroke: 17.5mm Liner: ABC Number of Ports: 6 Crankshaft: 14.0mm SG (pilot) shaft Piston: Fully CNC-machined aluminum alloy Connecting Rod: 7075 aluminum double bushing Claimed Output: 3+ @ 33,000RPM Max RPM: 36,000 Needle

Settings:

Main Needle Valve: 3-3-1/2 turns from closed Low Speed: Flush with ball end Barrel Stop Screws: 1/16" gap to start new engine Distance Between Mounting Holes Same Side: 0.83" (21mm) Distance Between Mounting Holes Opposite Side: 1.5" (38mm) Height Bottom of Mounting Tabs to Top of Cylinder Head: 4" (102mm) Width at Mounting Tabs: 1.8" (45.8mm) Width of Crankcase Below Mounting Tabs: 1.2" (30mm) Distance from Pull Start to Front Bearing: 3.3" (84.3mm) Distance from Center of Engine to Front Bearing: 1.8" (45mm) Distance from Center of Engine to Pull Start: 1.5" (39mm)