hydro Posted August 24, 2009 Share Posted August 24, 2009 I thought I’d post this as an “FYI” for all those who have 6 cylinder Mercury outboards. One morning last week I noticed an oil slick in back of the boat that was unusual, and then later in the day the “Low Oil” warning buzzer went off. I put a gallon of oil in the oil tank, which was odd, because I had just put in a gallon recently, and went back out. After about 20 minutes of run time, the buzzer went off again and the oil was gone. At $30.00 a gallon this is a problem, not to mention the issue of running out of oil out on the lake.The problem turned out to be a cracked oil reservoir cap on the tank under the cowl, which allowed the pressurized system to push the oil right out through the cracked cap. It makes a big mess under the cowl! The fix is simple, just replace the cap ($40 to $70 part), and apparently this is a rather common problem in these motors. This is something that I will add to my maintenance list to check. Quote Link to comment Share on other sites More sharing options...
BoxMN Posted August 24, 2009 Share Posted August 24, 2009 Good advice. Will start checking it on ours. Thanks Hydro. Quote Link to comment Share on other sites More sharing options...
JRedig Posted August 29, 2009 Share Posted August 29, 2009 Noted, thanks! Quote Link to comment Share on other sites More sharing options...
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