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Author Topic:   1997 75 hp mercury 2 stroke break in
Andy Holmes posted 07-04-2001 10:56 AM ET (US)   Profile for Andy Holmes   Send Email to Andy Holmes  
I recently purchased a 1998 17' standard with a 75 hp mercury 2 stroke outboard. The engine and boat have less than 5 hours on them, and have been sitting idle for 2 years. Other than draining the fuel out, and replacing it with fresh fuel, what should the break in procedure be? There is no manual with the engine or boat.
Thanks for the help.
Tom W Clark posted 07-04-2001 11:54 AM ET (US)     Profile for Tom W Clark  Send Email to Tom W Clark     

Change the gearcase oil now, and then again after you've put about 20 hours on it. As for running the engine, you needn't do much other than avoiding prolonged (more than a minute or two) full throttle operation until you've got another 5 or 10 hours on it. But do give it some full throttle operation in the mean time. Ideally the engine would get used at different RPM's and not just one cruise setting during the break-in period.

The fact of the matter is that the modern 2 stroke outboard is so good that you could thoroughly abuse it or run it any way you want and it would probably be just fine but the above mentioned advise will optimize the health of your new motor.

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