Digital Restoration

O.S. ENGINES OS-MAX-10FSR-B

Welcome to a tour through the results of the digital restoration of this 1.76 cc glow plug engine with longitudinally finned extreme cooling head.

 

An engine type of the FSR 1.76 cc series, which I had only noticed relatively late during the restoration of the GO-KART-10-GP. This motor type was also installed there as an alternative to the OS-MAX-10FSR-C with rotated extreme cooling head.


Single-cylinder 2-stroke engine with glow plug ignition, Schnürle flushing, rotary valve crankshaft, side exhaust, crankshaft bearing as pressed-in bronze bushing, throttle carburetor with cylindrical throttle plug. Special extreme cooling head for air cooling with longitudinal ribbing made of fine die-cast aluminum.

Other engines

OS-MAX-10FSR-B

OS-MAX-10FSR-C

OS-MAX-10FP-M

OS-MAX-50SX-H-HYPER

OS-RE-49

OS-RE-49-PI

OS-RE-49-PI-GOLD

OS-RE-49-PI-II

OS-RE-49-PI-II-GOLD

OS-RE-98-PI-2C

OS-RE-147-PI-3C

OS-FS-20

HB-25H

OS-MAX-10FSR

OS-MAX-10FSR-S

OS-MAX-10FSR-B

OS-MAX-10FSR-C

Displacement            1,76 ccm (0,107 cu.in)

Bore                            13,44 mm

Stroke                         12,40 mm

rpm range                  3.000...18.000 1/min

Performance              0,27 PS / 0,198 kW @ 17.000 1/min

Compression ratio    9.0:1 (full stroke)

Port timing                 Exhaust 146°, Transfer 124°, Third port 108°

Combustion type       2-stroke

Fuel                              Methanol, Oil, Nitromethane

>>> Blueprint

>>> Renderings








CAD-models            24.06.2022 - 22.08.2022

Rendering                24.07.2022 - 10.08.2022

Blueprint                  01.07.2023 - 09.07.2023

Step-model              _1486_os-max-10fsr-b.stp

Engine purchase     16.05.2022

Production date      approx. 1986