SuicideNemesis wrote: So if the previous owner had new plugs put in at 300hrs and I have only put about 40 hrs (total 344+-) on her those should be good, right? Then the lower, therms and the computer check and thats it? Easy day. Thanks.If you know for sure that the service was done at that interval. The expense to have it done is cheap compared to a failure on the water. “opinion only” If you are not 100% sure when the service was done then I would go ahead and get it done yourself and begin your own service records, That way there is no question.