THE FIRST 10 HOURS OF YOUR NEW ENGINE'S LIFE ARE VERY IMPORTANT. PLEASE USE THE FOLLOWING INFORMATION AS A GUIDELINE.
BREAK-IN PROCEDURES
- Do not perform break-in on water hose.
- Double your oil with a major manufacturer TCW-3 oil.
- Use a mid-grade octane major manufacturer fuel without alcohol.
- Liquid cooled engines should be slowly brought up to normal operating temperature to avoid cold seizure.
- For the first hour, operate the engine at a varied speed of 700-1500 RPM to break-in new pistons and rings.
- During the next 6 hours, operate the engine in gear at no more than 3,000 RPM. Accelerate using only enough throttle to bring the boat up on plane quickly and bring the throttle back to maintain a minimum plane speed.
- Vary your engine speed by accelerating to 3/4 throttle for 1 to 2 minutes, then back to minimum plane speed.
- During the final 3 hours you may operate the boat at wide-open throttle for periods of less than 2 minutes.
- It is very important to avoid operating at a constant speed of 3,000 to 4,000 RPM or continuous full throttle for the first 10 hours. This is the economy range in which the timing is at full advance and carburetor or fuel injection is running lean. This could lead to overheating and piston detonation.
- Cylinder heads should be re-torqued after the 10 hour break-in period.
This powerhead is replacing one that has failed prematurely. Powerhead failure is usually due to excessive combustion chamber temperatu re.You must find the cause of this failure or the same problem will occur again. Our experience Is that the piston is the part that fat Is first, usually caused by detonation. The following tips may help you avoid repeat failure:
- Check the entire fuel system Including fuel pump,Ilne filters, carbu retors, etc.
- Increase main metering jets by .002.
- Retard Ignition timing by 2 degrees.
- Replace or check all switch boxes and ignition modules.
- On Mercury motors, remove idle stabilizer and advance module.
CARBURETED OMC-JOHNSON-EVINRUDE
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- Install .002 larger main jets in carburetors.
- Retard maximum timing 2 degrees. Set Max timing with engine running over 4500 RPM under load. Do not set max timing static.
- Replace water pump and gaskets at time of powerhead replacement and every year. Use newest style gaskets.
- On 3-cylinder engines, replace the water pump with the late model high pressure style, check all OMC service bulletins and Jet carburetors accordingly.
- We recommend installing a water pressure gauge to monitor water flow in the engine.
- Use mid-grade octane major manufacturer fuel without alcohol.
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- We recommend removing the oil injection system or updating to the latest VRO pump.
- Clean and refill oil tank with TON-3 oil.
- Verify oil consumption by marking oil tank during double oil break-in period.
- Double your oil with a major manufacturerTCW-3 oil for approximately 30 gallons of fuel. If running oil injection, add 1 pint of oil to 6 gallons of gas. If no oil injection add 1 quart of oil to 6 gallons of gas.
- Re-torque cylinder heads after one hour running time, after engine has cooled.
- Rebuild carburetors and/ or fuel pump.
- Check overheat and oil alarm horn for proper function.
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CARBURETED & EFI MERCURY V6
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- Install .002 larger main jets in carburetors.
- Rebuild or replace carburetors and fuel pump.
- Retard maximum timing 2 degrees.
- Remove advance module and idle stabilizer if on motor.
- Replace water pump and all gaskets at time of power-head replacement and every year.
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- Use mid-grade octane major manufacturer fuel without alcohol.
- Check oil pump bushing and seal.
- Clean and refill oil tank with TCW-3 oil.
- Make sure trigger wires on flywheel are free moving.
- Re-torque cylinder heads after engine cools.
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