General maintenance and upkeep on Jetboat

[Jmonk]

I am just wondering if there is anything that I can do as far as maintenance on my 2000 challenger. I read the posts of things that have gone wrong and am just thankful that we have been very fortunate that nothing has happened mechanically to our boat of any significance. I have it yearly winterized and I am sure they do more than just that.

This forum is excellent.......and I learn so much. Everyone is so helpful!!
Thanks.....

At one point I thought I saw a post where someone said that they sprayed their engine with WD 40???

Thanks much!!

Jmonk