Re: New engine rpm etc
I pretty much followed this break in proceedure and have not had WOT for more than 30-45 sec. I also changed the oil and filter at 10 hours.
Marine Engine Break-in Period
The first 20 hours of operation is the engine break-in period. During this period, it is extremely important that the engine is operated as outlined in the following information;
If the engine has an accessible oil pump drive, it is recommended that the oil pump be driven with an outside source for approximately 10 minutes. This allows all points lubrication before the engine is started and substantially reduces the chance of dry start problems.
Before starting a new engine, base (static) ignition timing must be correctly set and the carburetor primed with fuel. Excessive cranking of the engine to bring fuel to the carburetor or playing with the distributor on an out of time engine must be avoided. This excessive cranking will place excessive load/wear on internal components due to insufficient oil supply and lead to premature failure of components.
1. Upon engine firing, the RPM must be taken to 2000 for 20-30 minutes to properly break-in the camshaft. Failure to do so can lead to premature failure of the camshaft and lifters. During this period DO NOT drop to idle to check ignition timing. As long as the engine runs without labouring you can complete the cam break-in period. If the exhaust is too hot advance timing slightly.
2. After camshaft break-in, it is recommended that oil add filter be changed and the balance of the break-in period be completed.
3. DO NOT operate engine below 1500 RPM for extended periods of time during the first 1O hours. During this period, shift into gear as soon as possible after starting engine and advance throttle so that RPM is above 1500 (provided that conditions permit safe operation at this speed)
4. DO NOT operate at any one constant speed for extended periods of time.
5. DO NOT exceed ¾ of full throttle during the first 10 hours of operation. During the next 10 hours, occasional operation at full throttle (5 minutes at-a-time maximum) is permissible.
6. AVOID full throttle operation from stopped position.
7. DO NOT operate at full throttle until the engine reaches normal operating temperature.
8. OBSERVE INSTRUMENTATION carefully. If an abnormal reading occurs, stop the engine immediately and determine cause.
9. FREQUENTLY CHECK oil-level and add oil if necessary. It is normal for oil consumption to be somewhat high during the break-in period.
10. At the end of 20-hour break-in period drain break-in oil from crankcase and replace filter.
Recommended oil is listed in the manufacturers, operators manual. Oils in the 20-50 series are not recommended for break-in. Oils should be of SE/SF or higher API rating.
NOTE: In I/O (sterndrive) applications, the drive MUST be checked for alignment to prevent premature engine bearing failure due to side loading.
I will post pics of the drive fully down.
Thanks
