O.S. Engines, .12TZ (P)-T 5 Port w/11HB Carb

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OSMG1998      .12TZ (P)-T 5 Port w/11HB Carb

TECH NOTES

This is the O.S. Max 12TZ ABC Pilot Crankshaft
5 Port Turbo Engine for 1/10 scale racing.

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

FEATURES: Black powder coated aluminum construction
Nine fin natural 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(B) 3 needle Slide Valve Carburetor OSMG2474 with ROAR
legal 5.5mm carb restrictor and 6.5mm restrictor for outlaw racing
Rear Exhaust
ABC construction, Aluminum piston and Brass liner that is Chrome
plated, 5 port cylinder liner
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(B) Slide Valve Carb OSMG2474, & 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

SPECS:    Bore:      0.54" (13.8mm)
Stroke:    0.55" (14.0mm)
Displacement: 2.11cc
Practical RPM Range: 5,000-40,000 rpm
Power Output: 1.62 @ 34,400
Weight:       7.9oz (224.5g)

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:              2" (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 engine 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 eng manual

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

Throttle Stop Screw: This is set so the rotor is still 0.5mm open
when closed per page 18 of engine manual.
12TZ ABC engines in this series include:
11M Carb, 3-Port Standard Crankshaft, OSMG1995
11M Carb, 3-Port Short Crankshaft, OSMG1996
11H Carb, 3-Port Pilot Crankshaft, OSMG1997

The difference between this engine and the .12TZ(P)-T 3 Port Turbo (OSMG1997)
is that this engine has 5 ports, different crankshaft, crankcase is black
powder coated, & has a natural aluminum head instead of the blue head.

ACCESSORIES

THIS IS THE O.S. MAX .12TZ TURBO ENGINE WITH PILOT STYLE CRANKSHAFT.
FEATURES: ABC CONSTRUCTION, 5-PORT CYLINDER CONSTRUCTION, P-6 GLOW PLUG, 11H(B)
SLIDE CARB, HIGH TENSILE A7075 "KNIFE EDGE" ALUMINUM CONNECTING ROD
REQUIRES: 10-30% NITRO FUEL, GLOW STARTER AND  FUEL LINE