O.S. Engines, .12TZ (P)-T w/11H Slide Carb

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OSMG1997      .12TZ (P)-T w/11H Slide Carb

TECH NOTES

This is the O.S. Max 12TZ ABC Pilot Crankshaft
Turbo Engine for 1/10 scale racing.
Meets IFMAR and ROAR 3-port specifications.

*** Due to the High Performance of the TZ Series Engines ***
***    OS does NOT provide a warranty with this engine   ***

FEATURES: Natural aluminum construction
Nine fin blue aluminum cooling head
Two-piece turbo cylinder head with 29mm innner and 49mm outer head
that adds extra area for more efficient cooling
Slide Carb 11H - 3 needle slide valve carburetor OSMG2473
with ROAR legal 5.5mm carb restrictor
Rear Exhaust
ABC construction, Aluminum piston and Brass liner that is Chrome
plated
High tensile A7075 "knife edge" aluminum connecting rod double
bushed for friction-free operation
Offers enormous torque from low RPM

INCLUDES: One O.S. Max 12TZ ABC Pilot Shaft Turbo Engine with P6 Glow Plug
(OSMG2696) 11H Slide Valve Carb OSMG2473, & instruction manual
One Exhaust Seal OSMG8871

REQUIRES: Fuel: 10%-30% nitro (recommend starting w/20% changing to a higher
nitro content if necessary) w/18% lubricant
Air Cleaner DTXG2612

SPECS:    Bore:         0.54" (13.8mm)
Stroke:       0.55" (14.0mm)
Displacement: 2.11cc
Practical RPM Range: 5000-40,000 rpm
Power Output: 1.5hp @ 33,500rpm
Weight:       7.92oz (225g)

Distance between mounting holes same side:             0.43"   (11mm)
Distance between mounting holes opposite side:          1.2" (31.4mm)
Width not including mounting flanges:                     1" (25.4mm)
Width including mounting flanges:                       1.5"   (39mm)
Height bottom of crankcase to top of cylinder head:     3.5" (89.6mm)
Height bottom of mounting flanges to top cylinder head:   3" (77.2mm)
Height crankshaft center to top of cylinder head:         3" (77.2mm)
Length from front of crankcase to end of crankshaft:    1.2" (29.5mm)
Length center line of piston to front of crankcase:     1.4" (34.8mm)
Length center line of piston to front of crankshaft:    2.5" (64.3mm)
Length from backplate to end of crankshaft:             3.1" (79.4mm)
Length from backplate to front of crankcase:            1.9" (49.9mm)
Crankshaft threads: 1/4-28

COMMENTS: Some notes on slide valve and rotary carburetors:
Rotary carbs offer a larger response in the middle of the power
band. This works well for off-road applications when throttle
response must be varied.
Slide Valve carbs provide greater response at the beginning and end
of the power band. This works well for on-road and racing
applications for fast take-offs and high speed.
Many high-performance engines have short lives, as racers constantly
strive to "lean them out" for greater performance. Unfortunately,
it also makes engines run hotter, which reduces their lives.

Needle Settings:
Needle Valve (aka High Speed Needle):1ž open from closed position
per page 18 of manual.

Mixture Control Screw (aka Low Speed Needle):The head of the mixture
control screw is flush with the carb body per page 25 of manual.

Metering Needle: Head of metering needle screw is flush with the
ball link body per page 25 of manual.

Throttle Stop Screw: This is set so the rotor is still 0.5mm open
when closed per page 18 of manual.

12TZ ABC engines in this series include:
-11M Rotary Carb, 3-Port Standard Crankshaft, OSMG1995
-11M Rotary Carb, 3-Port Short Crankshaft, OSMG1996
-11HB Slide Valve Carb, 5-Port Pilot Crankshaft, OSMG1998

ACCESSORIES

THIS IS THE O.S. MAX .12TZ TURBO ENGINE W/ PILOT STYLE CRANKSHAFT.
FEATURES: ABC CONSTRUCTION, MEETS IFMAR AND ROAR 3-PORT SPECIFICATIONS, 11H
SLIDE VALVE CARB, HIGH TENSILE A7075 "KNIFE EDGE" ALUMINUM CONNECTING ROD
REQUIRES: 10-30% NITRO FUEL, GLOW STARTER AND  FUEL LINE