OSMG2086 1A209 Speed B21 Ty Tessmann II Engine (OS Engines)

OSMG2086 1A209 Speed B21 Ty Tessmann II Engine

$469.99 Excl. tax

*AFFIRM Finance Offer Available on Total Purchases of $99 or More

Delivery time: In Stock Ships Mon-Fri within 24-48hrs
Part Number: OSMG2086
Quantity In Stock: 1

OSMG2086 1A209 Speed B21 Ty Tessmann II Engine


O.S. Speed B21 Ty Tessmann II Limited Edition engine is a power plant worthy of Ty's winning pedigree. Unique features include a low-profile cylinder head designed by Ty, a 5.8 mm carb reducer and laser-etched engravings of Ty's signature on the crankshaft, cylinder head and crankcase. So whether you are a fan of Ty, or just a fan of O.S., this engine is available for a limited time only, so get one before they are gone! 


  • Special low-profile cylinder head with double-height vertical fins, designed by Ty Tessmann
  • Crankshaft cylinder head and crankcase feature a laser-etched engraving of Ty Tessmann's signature
  • 5.8 mm carb reducer
  • 21J3 (B) slide valve carburetor
  • P3 Turbo glow plug
  • Exhaust seal ring
  • Dust cap set

0.65 in (16.4 mm)     
Crankshaft Threads: UNF 1/4-28     
Cylinders: Single     
Displacement: 0.211 cu in (3.49 cc)     
HP: 2.61 hp @ 34,000 rpm     
Height: 3.32 in (84.3 mm)     
Length: 3.70 in (94 mm)     
Plug Type: P3 Turbo Glow Plug     
RPM Range: 4,000 - 42,000 rpm     
Recommended Fuel: 10-30% nitro content     
Stroke: 0.65 in (16.4 mm)     
Total Weight: 12.6 oz (356 g)     
Width: 1.77 in (45 mm)

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