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| I'm not sure it's really "aftermarket" but what I have found (thanks to Mark Hintz) is running the Mercury Engine Treatment stuff thru the gas really helps the motor run better...
Also Sea Foam in the first tank and once again before fall helps too...don't run them together...use them in different fill ups but I really noticed my 175 efi ran better with the Mercury stuff in the gas...it's like 11 bucks for 12 oz and that treats 72 gallons of gas..like Mark says,,,"cheap insurance"....
I highly recommend...Also, Yamaha Ring Free too is good. | |
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