Ok.. so I been workin on dad's 97 mxz 583 Liquid... wondering if anyone can tell me WHY it seems to keep losing fire on one cylinder... Plug shows that it would be running a little fat, but nothing horrid... pop a new plug in and the fire comes back.. but seems weak. Checked connections/ cleaned up/ still same, but have not had a chance to ride and see if it is fixed... but spark still seems weak..
Any logical ideas? (aside it's a skidoo LOL

)
Thanks, Brad