how to break in motor

[rob711]

i just got a 2005 leftover boat with a 115hp 4 stroke merc..the dealer lost the manual any ideas how to properly break it in i have a manual comming but i'd like to use it this weekend....i was told by the guy who prepped the boat to vary the rpms and no full throttle for 10 hrs..mercury e mailed me a generic manual that must be for there 2 strokes because it mentions adding oil to the gas for the first tank!! any ideas

 

[studlymandingo]

Re: how to break in motor

you are supposed to add oil to the first tank of fuel on a two-stroke.​

 

[rob711]

Re: how to break in motor

yeah...but this is a 4 stroke

 

[raevin51]

Re: how to break in motor

I think my first call would be to another Merc. dealer! The one you are dealing with obviously does not know his own product. Your best bet would be to contact a Merc dealer and ask to speak to a service rep or tech, you stand a better chance of getting the correct info.

 

[studlymandingo]

Re: how to break in motor

If it's a 4-stroke then no oil is necessary in the fuel.​

 

[Skinnywater]

Re: how to break in motor

From my Honda 90 owner's manuel;

First 10 minutes: Run engine at trolling speed. Use minimum throttle opening to maintain a safe operating speed.

Next 45 minutes: Run engine up to a maximum of 2,000 to 3,000 rpm.

Next 60 minutes: Run engine up to a maximum of 4,000 to 5,000 rpm.
Short full throttle bursts are OK, but do not operate the engine continuously at full throttle.

Next 8 hours: Do not run the engine at full throttle for more than 5 minutes at a time.

 

[tashasdaddy]

Re: how to break in motor

you know that's a hell of an investment, i would order an owner's manual atleast.

 

[Frank Acampora]

Re: how to break in motor

That's pretty much what auto manufacturers indicate also: Go easy on engine for first 500 miles and vary speeds. short bursts of full throttle to speed limits will aid in setting rings but no prolonged high speeds or full throttle operation.

 

[rob711]

Re: how to break in motor

thanks everyone..exspecially skinny, for breaking out your manual..like i said i have a manual comming from the dealer but he had to order it then mail it to me..i got the boat from out of state..it was a left over...we went out sunday..i never stayed at the same rpm for more than 5 minutes..only went wot for about 1 minute on the way home...and i waited about a half hour to go over 3000 rpm..