OFNA Racing Picco .12 R, 3 or 7 Port User Manual

OFNA/PICCO .12R 3PORT & 7PORT ENGINE

#51120 - .12R 7P TURBO PLUG, THREADED
#51121 - .12R 7P TURBO PLUG, SG
#51122 - .12R 3P STD. PLUG, THREADED, ROAR LEGAL
#51123 - .12R 3P STD. PLUG, SG, ROAR LEGAL

Stop!! Carburetor LOW-END screw is preset by factory.... Do not change until you read

break-in instructions.

NEW ENGINE BREAK-IN

Your OFNA engine is extremely tight when the piston is at the top of the stroke and turning the crankshaft by hand. This is
normal for a new ABC type engine. The piston and sleeve are matched for fit and the top of the sleeve is tapered for a tight
fit. As you run your engine, this tightness should diminish. There is no cause for alarm, because as the engine warms up,
the brass sleeve will expand faster than the aluminum piston and the engine will turn freer.

As with any new engine, there are many high spots and tight fits in the matching process. High spots create hot spots that
must be broke-in. Therefore, the break-in process is very important to provide good service by the OFNA engine. So, you
must run the engine rich (COOL) for the first three tanks of fuel. We recommend using one gallon of 20% ODONNELL or
BYRON'S 2000 as break-in fuel. Other break-in type fuels or added oil is NOT needed. DO NOT OVER REV THE ENGINE
WHEN FIRST STARTING, this could break the piston and over heat sleeve. Let engine run at a fast idle for one tank to
break-in connecting rod bearing before starting full break-in. Let engine cool down before continuing and never stop engine
with piston at top of the cylinder. This cool down period is for heat cycling the parts.

Break-in the engine in the car, by running the engine at a rich master needle setting (3 turns or
more if needed). Run the car from a slow to fast speed with short bursts of speed. You need to buildup a little heat

(warm to the touch) in the engine, but not too hot. In a rich setting (2 or more turns), the engine will run cold. In the leaner
setting (2 or less turns), the engine runs hotter. Do not heat up the engine too much at this time, let it cool down if too hot.
After about one (1) tank, turn the Master Needle Valve, clock wise, 1/16 of a turn leaner or clockwise. Keeping the fuel
tank full, continue the process until you slowly turn the Master Needle Valve, 1/16 of turn each time, too a leaner point and in
which the engine runs at high RPM and power, but still keep max temp. of under 250 deg. F. At this point you must stop,
too lean of a setting will heat up engine and damage the piston. A normal operating temperature is around 200 to 240 Deg.
Temperatures of 270 Deg. and above will damage engine and shorten life.

STARTING NEEDLE SETTINGS

Master Needle Valve - main control for fuel mixture. Set at 2 to 3 turns out from flush. Adjust this needle for maximum RPM
and power without being too lean or too hot.

Barrel Needle (Low Speed) - This needle is in the center of the carburetor barrel and provides throttle response. It is not
the idle adjustment. Turning screw "IN" is Lean and "Out" is Rich. Do not adjust this needle until the Master Needle is set
for power and best performance. This needle will only effect throttle response, so adjust needle until throttle response is
clean with little or on delay. Once set, do not continue to turn (lean) needle further. This is important since continuing to
turn needle will only increase engine temp, at lower RPM, which will throw off engine overall tuning.

Barrel Stop Screws - Used for adjusting Idle. Set for 1/16th inch gap to start new engines. You can open more for faster
idle.

USE LONG GLOW PLUG WITHOUT IDLE BAR,

STANDARD PLUG (OFNA/PICCO 51007 PLUG) IS RECOMMENDED

OR

TURBO PLUG (OFNA/PICCO 51006 PLUG) IS RECOMMENDED

# 51502 - Standard Plug
# 51503 - Turbo Plug

# 51510 - 0.1mm Shim
# 51511 - 0.2mm Shim

# 51524

OFNA/PICCO .12R 3PORT & 7PORT ENGINE

#51120 - .12R 7P TURBO PLUG, THREADED
#51121 - .12R 7P TURBOPLUG, SG
#51122 - .12R 3P STD. PLUG, THREADED, ROAR LEGAL
#51123 - .12R 3P STD. PLUG, SG, ROAR LEGAL

# 51504 - Violet
# 51505 - Champagne

# 51317

# 51519

# 51514 (2pcs.)

# 51513

# 51520

# 51512

# 51303

# 51515 - Crankshaft, SG
# 51516 - Crankshaft, Threaded

# 51518

PICCO .12 REAR EXHT ENGINE, 3 PORT AND 7 PORT PARTS

51303 PIN REF., CYLINDER 0.95
51317 SCREWS, REAR COVER 1.95
51500 CARBURETOR, ROTARY, PICCO 12/15ENGINE, COMPLETE 69.95
51501 CARBURETOR, SLIDE, PICCO 12/15ENGINE, COMPLETE 69.95
51502 INSERT, HEAD, STD. GLOW PLUG .12R 20.95
51503 INSERT, HEAD, TURBO GLOW PLUG .12R 21.95
51504 HEAD, TALL, .12R, OFNA 12, VIOLET (3P) 49.95
51505 HEAD, TALL, .12R, OFNA 12, CHAMPAGNE (7P) 49.95
51506 CASE, .12R OFNA, SILVER (3P) 99.95
51507 CASE, .12R OFNA, BLACK (7P) 9.95
51508 CYLINDER/PISTON, OFNA 3 PORT, ABC 69.95
51509 CYLINDER/PISTON, OFNA 7 PORT, ABC 76.95
51510 SHIM, HEAD, 0.1mm 0.99
51511 SHIM, HEAD, 0.2mm 0.99
51512 CONNECTING ROD, COMPETITION, .12R 36.95
51513 PIN, WRIST, PISTON, .12R 6.95
51514 CLIPS, WRIST PIN RETAINERS, 2PCS. 0.99
51515 CRANKSHAFT, SG, COMPETITION, .12R 69.95
51516 CRANKSHAFT, THREADED, COMPETITION, .12R 69.95
51517 BEARING, FRONT, .12R 25.95
51518 BEARING, INSIDE, .12R 35.95
51519 COVER, REAR .12R 12.95
51520 O-RING, COVER, REAR .12R 1.95
51521 LOCKING PIN, CARB. .12R 2.95
51522 CONE, BLACK COLLET, .12R 1.95
51523 O-RING, CARB. 2 PCS. 0.99
51524 SCREWS, 6 PCS. M3x13mm 4.95

# 51508 - 3 Port
# 51509 - 7 Port

# 51523 (2pcs.)

# 51500 - Rotary Carburetor .12R (option)
# 51501 - Slide Carburetor .12R (standard)

# 51517

# 51521

# 51522

PICCO CARBURETOR PARTS (NYLON BODY)

Parts Not Shown as of yet.

OFNA/PICCO .12 and .21 ENGINES (REAR EXHAUST)

.12 PIPE AND MANIFOLD (.12 SPECIAL)

51900 .I2 PICCO INLINE PIPE & MANIFOLD & SPRING - SEAL, POLISHED 120.95
51901 .I2 PICCO INLINE MANIFOLD & SPRING - SEAL, POLISHED

(USE PIPE #51902) 39.95
51902 .I2 PICCO INLINE PIPE, POLISHED (USE MANIFOLD #51901) 79.95
51903 .I2 PICCO MANIFOLD, STANDARD PIPE, POLISHED 29.95

51904 .I2 NOVI ROSSI INLINE MANIFOLD TO PICCO INLINE PIPE, POLISHED 39.95