Well that may be true but my thought was not to throw parts at a problem but a unit that is 20 years old & has never been serviced other than oil & air filter & that has not been touched in at least 4 years since th rv has been moved might need some fresh parts. & yes I would like to change the spark plugs but still can not find them or anyone to tell me where to look. There is not much room to work in this small of space so I do what I can. Thanks for replying & if u can tell me where to look for spark plugs then that will be next on my list. Thanks