Rebuilt engine break-in

[crazyray]

Just Rebuilt engine in our boat...what would be ya'lls suggestions for breakin procedures.

 

[sony2001]

Re: Rebuilt engine break-in

Mineral oil only for 25 hours and not over 3500 rpm. Buy a magnetized oil drain plug to see if the rebuild is self- destructing. {metal filings}

 

[Walter]

Re: Rebuilt engine break-in

Uh...unless Sony is a mind reader...I don't know how he knows what engine you have.<br /><br />Tell us the year, make, model, etc....and maybe we can help. Also...what components were replaced??<br /><br />Walt

 

[crazyray]

Re: Rebuilt engine break-in

sorry guys it is a 120 mercruiser 153 cu inch 1977 model.... in 17' galaxie turned crank..new rings bearings etc.....

 

[Wellcraft 89]

Re: Rebuilt engine break-in

watch your water temp and oil press like a hawk!<br />don't run wot right away,vary your rpm's, ease into <br /> an off the throttle ,no sudden <br />and change oil after 4-5 hrs run time.<br /> <br />Have you ran it yet,did you rering it also?<br />if so I hope you soaked those new rings in oil by the top of the pistons, let it smoke that oil off it won't hurt it,it will help them seat in better.<br /><br />Just My $.02<br /><br />Rich

 

[L Christopher]

Re: Rebuilt engine break-in

What Wellcraft 89 said. If you want to know what is going on inside you engine at first oil change, capture a sample (3 or 4oz) in a clean container that you can seal. Take sample to a heavy equipment dealer (Cat or John Deere) and have them do a fluid test. Cost about $10 - $12. The test will tell you more than you want to know but could give you peace of mind.