You'll have to excuse the following rant! I have an ECC Gladesmen with the 9.9 Honda motor. I seriously wanted to sell this but when a serious buyer came along, the motor wouldn't start for the test ride. Lost out on the sale! After spending hours on the maintinece, I decided to change the plugs. they were a little black ( read fouled) Off to the Honda website to see where the dealers where, called to see what time they opened. Head over, see my motor on the floor, and they don;t have the plugs I need. Head to the other Honda dealer and they don't have what I need either. Web searches show that the spark plugs cost upwards of $10 each!! WTF??? Senso plugs have no replacement parts? Went to NAPA, Auto Zone, And other auto parts store and couldn't find a replacement plug! Guess it's iternet sales for me even though I like to spend money locally.