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OFNA Racing
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Hyper 18
User Manual
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OFNA Racing Hyper 18 User Manual

OFNA DESCRIPTIONS RETAIL OFNA DESCRIPTIONS RETAIL
53012
BEARING,FRONT 7x19x6mm 6.95
53358
CONNECTING ROD HYPER 18 27.95
53024
53359
SCREWS SET HYPER 18 9.95
53058
BARREL STOP SCREW, HYPER 4.95
53360
PISTON, SLEEVE, ROD COMBO H18 109.95
53060
MAIN NEEDLE AND SEAL, HYPER 5.95
53361
BACK COVER & O-RING HYPER 18 13.95
53309
CLIPS, G, 5PCS 1.95
53362
O-RING COMPLETE SET HYPER 18 7.95
53312
CAP SCREW 3x16mm (4PCS) 1.95
53363
BALL BEARING,12x21x5mm H18 23.95
53315
53364
CRANKSHAFT HYPER 10 39.95
53316
CAP SCREW 3x10mm (4PCS) 1.95
53365
CRANKCASE W/FR&RR BEARING H18 75.95
53318
SILICONE MANIFOLD SEAL 3.95
53366
MAIN NEEDLE HOUSING SET H18 14.95
53321
THROTTLE RUBBER COVER 3.45
53367
TURBO FAN & ONE WAY HYPER 18 29.95
53324
SUPPLY FUEL NOZZLE & O-RING 5.95
53368
CARB. RESTRICTOR HYPER 18 5.95
53351
53369
CARBURETOR COMPLETE HYPER 18 69.95
53352
HEAD BUTTON HYPER 18 2.95
53370
CARB LOCKING PIN HYPER 18 9.95
53353
HEAD CAP SCREWS 3x12mm H18 2.95
53371
THROTTLE BALL STUD HYPER 18 6.95
53354
53372
LOW END NEEDLE HYPER 18 7.95
53355
53373
CARB BODY AND THROTTLE H18 34.95
53356
53374
CAP SCREWS 2.6x7mm FOR PS H18 2.95
53357
WRIST PIN & G CLIPS HYPER 18 5.95
53375
PULLSTART COMPLETE HYPER 18 39.95
53121 HYPER 18 SG W/PULLSTART
53360
53309
53353
53352
53356
53354
53358
53351
53357
53355
53366
53324
53058
53373
53060
53368
53372
53321
53371
53369
53370
53012
53365
53361
53363
53364
53367
53315
53324
53362
53316
53375
53374
OFNA
7 VANDERBILT IRVINE, CA 92618 PHONE: (949) 586-2910 WWW.OFNA.COM WWW.RCDEAL.COM
HYPER 18 ENGINE
PART # 53121
Thank you for purchasing a OFNA engine. We appreciate your choice and know you will enjoy running it. Please
note that the OFNA information in engine box is subject to change without notice.
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 free.
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 engine. So, you must run the engine rich (COOL) for the first two tanks of fuel. We recommend using 20% O’Donnell 0R BYRON’S 2000 as break-in fuel. Other break-in type fuels or added oil is NOT needed. DO NOT OVER REV. THE THE ENGINE WHEN FIRST STARTING, this could break the rod, piston and over heat the sleeve. Let the engine run at low RPM for one tank to break-in connecting rod bearing before starting full break-in.
Break-in the engine in the car, by running the engine at a rich setting. Factory high end or master needle is 4 turn
Out from all the way close. Run the car from a slow to fast speed with short bursts of speed. You need to build
Little heat in the engine, but not too hot. In a rich setting, the engine will run cool. In the leaner setting the engine run Hot running hot is NOT good yet. Do not heat up the engine too much at this time. After about two (2) tank, turn the Master Needle Valve, clock wise, 1/8 of a turn leaner or clockwise. Keeping the fuel tank full, continue the process until you slowly turn the Master Needle Valve, 1/8 of turn each time, to a leaner point and in which the
engine runs at high RPM and power and the master needle should be at 3-3.5 turn out from close, but still keeping
The MAX TEMP UNDER 250 DEGREES F.
If you go over 250 degrees it is too lean of a setting and will over heat the engine and damage the piston.
Normal operating temperature is around 220 to 250 Deg.
Engine an shorten the life of the motor.
Temperatures of 260 Deg. and above will damage
NEEDLE SETTINGS After break-in:
Master Needle Valve - (High End) Set at 3 to 31/2 turns from closed. Adjust this needle for maximum RPM and power without being too lean or too hot. Make sure you start at bottom of needle seat!!
Mid Range needle - The brass needle on the side of the carb. DO NOT TOUCH.
Side Carb. Needle (Low Speed) - This needle is in the center side of the carburetor where the blue boot is, provide Throttle response. It is not the idle adjustment. Set NEEDLE flush with the ball end. Turning in is Lean and Out is Rich.
Do not adjust
Barrel Stop Screws - Used for adjusting Idle: Set for 1/16th inch gap to start new engines. You can open more for faster idle.
This needle until the Master Needle is set for power and top speed. This will only effect throttle response.
OFNA/PICCO GLOW PLUG IS RECOMMENDED
51010 - B4 STANDARD HOT 51011 - B5 STANDARD MEDIUM 51012 - B6 STANDARD COLD 51013 - T4 TURBO HOT 51014 - T5 TURBO MED 51015 - T6 TURBO COLD
OFNA RACING , 7 VANDERBILT, IRVINE, CA. 92618 • TEL:(949)586-2910
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