Break in ?

[GatorMike]

I am near the end of my break in period on my rebuilt 98 115. After about 15 hours I am a little disappointed in the way she idles. I'm wondering if running double oil has any effect on idling? Here in Florida we have a bunch of manatee (idle speed) zones and after a day of running these zones she feels like she is misfiring every now and then. I hate to start making adjustments if this is a problem that will straighten itself out once I start running regular oil,

 

[Dhadley]

Re: Break in ?

Lets start with the basics. Which 98 115 do you have? The crossflow or the 60 degree looper?<br /><br />How about the set up? Are you running oil injection plus 50:1 in the tank or 24:1 in the tank? What spark plugs? What grade fuel? What oil? <br /><br />On double oil it may start to load up but it shouldnt be too bad. Naturally the idle time has a lot to do with it. Are all adjustments set as produced -- timing, jetting etc?<br /><br />What kind of boat do you have? Does the motor sit rather low in the water when your at idle speed? <br /><br />I know -- too many questions.

 

[GatorMike]

Re: Break in ?

It's a crossflow, mixing oil 24-1 in the tank, regular gas, I usually just buy whatever brand of Tw3 oil the gas station I fill up at carries. Just using the standard plugs recommended by my owners manual sorry don't have the info on that handy. It is on a 19' Welcraft cc and yes the motor sits quite low in the water.

 

[Dhadley]

Re: Break in ?

Sitting low in the water will cause a lot of backpressure and the motor cant breathe as well obviously. I might suggest a better oil like the Pennzoil Blend. You can get it at most X-marts for less than 10.00 a gallon. <br /><br />The crossflows were good motors. That motor should idle great for long periods as long as its set up right. <br /><br />With 15 hours you could probably start thinning down on oil. Whatever your engine builder recommends. Once you get to 50:1 it may do a lot better. Remember, use Champion plugs only.<br /><br />Try the Pennzoil Blend. I think you'll be impressed. I accidently mixed 50 gallons once at 24:1 and my 150 crossflow didnt really act much different.