WARNING

PLEASE READ ALL SAFETY INSTRUCTIONS! Failure to read, understand and follow these instructions could result in personal injury and/or property damage to yourself or others.

Take a few moments to familiarize yourself with the various parts of the engine. DO NOT DISASSEMBLE YOUR ENGINE! Doing so will void your warranty. No exceptions!

ENGINE OPERATION TIPS

NEW CLEANING AND LUBRICATING FEATURES: A cleaning hole has been added to the front housing to aid in cleaning the front or top bearing. Simply place an aerosol can of Liquid Wrench (or similar product) up to the hole and “back” flush the bearing. Continue to flush the bearing until you see fresh cleaner come out under the flywheel. The bearing may also be oiled in the same manner.

A lubricating hole for the flex shaft has been added to the lower unit. It is recommend that each time, before you run the unit, you lubricate the cable with a mixture of 50% STP and 50% 20-50 weight oil. K&B still recommends that you continue to remove, inspect and re-lube the flex cable (using Lube P/N 8449) on a continued basis.

HEAD CLEARANCE: Your engine has been factory set with a head clearance of approximately .015 to .018.

MAINTENANCE: We recommend after each days running, that you check each bolt and screw for tightness.

CAUTION: For maximum life of propeller shaft bushing do not operate engine out of the water for a period of longer than thirty (30) to forty-five (45) seconds.

THE LOWER END: Tests have proven that the cable drive is far superior to the gear drive. Maintenance is cut down to a minimum. However, we ask that you occasionally check and lubricate the flex cable. Check for excess wear and fraying. Do not rotate the engine by flipping the propeller in a counter-clockwise direction. Fraying and unwinding may occur. We recommend a good silicone base lubricant such as K&B marine grease (P/N 8449) for your outboard as well as other drive units.

GLOW PLUG: This engine is designed to use the long reach K&B 7311 Glow Plug.

FUEL: We recommend using 25% to 50% nitro with an oil content of 18% by volume. Do not use fuel with under 25% nitro content.

BREAK-IN

An “ABC” type engine, (Aluminum, Brass, Chrome) does not require prolonged break-in periods. However, we do recommend that you run the engine at a slightly rich needle valve setting for the first two runs. These runs should be made with the engine installed on the boat and running in the water for periods of not less than five (5) minutes each. Typically, an engine will be ready for continuous full throttle and a leaner needle valve setting after ten (10) to fifteen (15) minutes of running. Break-in MUST be done on the pond while boat is running. Do not attempt to either set the carburetor mixture or break the engine in by any other means that this.

CAUTION: If the engine is run at a lean needle valve setting during the break-in period, the following may result.

1. Piston and sleeve will overheat and score.

2. The connecting rod, crankshaft and wrist pin will overheat from lack of lubricant and seize, causing the lower con-rod bushing to spin in the con-rod, or in extreme cases, the bottom of the con-rod will break, causing damage to the crankcase, piston and sleeve.

3. The crankshaft may seize inside the front plate and fracture.

STARTING ENGINE

The engine runs in a clockwise rotation. Make certain that your starter motor is running in the same direction. With the tank full of fuel, radio on and glow plug battery leads off, fully open the carburetor, and with your finger covering the carburetor venturi, spin the engine with the starter for about a two second burst. This primes the engine. Now close the carburetor to the starting position. Connect the GLOW battery and spin the engine again. The engine should fire up and run. We recommend that you start your engine close to the water so that you will not have too far to walk with the engine running. It is also advised that you keep the engine at a slow or not greater than a slightly fast idle until you get into the water, as over revving plus overheating can damage your engine.

OTHER RECOMMENDATIONS

We recommend that you use a fuel filter in your fuel system. Install the fuel filter on the fuel pickup tubing between the tank and carburetor. It will keep foreign matter from going into the carburetor to create clogging. However, the filter also can clog up. Therefore, should it clog, remove the filter from the fuel line and clean it as per the manufacturer’s instructions.

PROPELLERS

Propellers are naturally an important factor. Most propellers that are available on the market need balancing and “cleaning up”. Unbalanced props cause cracks on boat hulls, not to mention robbing your engine of horse power and your boat of performance. So, balancing the prop is very important.

A Prather 230 SS or 235 SS (stainless steel) is a good starting propeller for this engine.

OPERATING INSTRUCTIONS

If you are unfamiliar with this line of carburetors or are a new modeler, please do not attempt to start the engine until you have read and understand the following instructions:

1.    NEEDLE VALVE SETUP

2.    LINKAGE SETUP

Note that there are two fuel metering adjustments:

1.    HIGH-SPEED NEEDLE VALVE

2.    LOW SPEED and MID-RANGE ADJUSTMENT

As a starting point for the high speed needle adjustment, completely close the needle valve (clockwise), then open it (counterclockwise) four and a half turns. This setting is an average and may require further adjustments. For higher altitudes (3,000 - 4,000 feet), close needle valve approximately 1/2 turn.

PRESSURIZED SYSTEM

All series “94” carburetors must run with exhaust pressure from the exhaust system to the fuel tank.