In the owners manual it is recommended to use Champion QL77CC so I am going to put a set of these in and see if my performance changes. Now that I think of it my problems started around the same time I changed to NGK BR8HS plugs which are NGK's replacements. In my search to get it running like new again I findly found a forum that enlightened me about spark plugs. At the lake it idles poorly smokes a lot and only takes about a week to foul the plugs where as on the ocean it takes longer but it still performs poorly compared to when it was new. I run on the ocean mostly but also on a lake we have a cottage on at an elevation over 3,000 feet. Since the beginning of the summer 2009 the best I have been able to get is around 62 MPH. ![]() ![]() I bought the boat with the motor in 2008 with only about 30 hours on it and it would run up to 70 MPH. I have a 2002 Mercury 250 EFI Model 250XL and I have been plagued since 2009 with a loss in power, increased fuel consumption, and fouling spark plugs.
0 Comments
Leave a Reply. |