Nope, not the Muddy dog it runs great. BUT We have an old Polaris indy 400. The backup gear is messed up, and I had to replace the gasket to keep in the oil. I did not want to spend $400 on a $100 sled so we have no reverse. The starter drive was so gummed up it would not slide into the flywheel gear, I fixed that and lubed it with my forming chain lube. It ran fine last year, this year we found the battery had frozen and split, we fixed that. Now it turns like nobody's business. BUT Here is the problem It does not fire up. I put in new gas and used starting spray. Nothing. I pulled the plugs there used and black but I thought they should still work, I cleaned them. Grounded them on the head and spun it over, no spark at all, on either. I checked the kill switch and it is in the run position. Where should I look this happened when it was parked all summer, in fact, I started it once this summer. The first thing I'm thinking is to change the plugs there probably 15 years old. What should I look at next if they don't take care of the problem? Whenever something happens out of the blue after I have done some work on it is to question if I did something. Your learned opinion is greatly appreciated. We have a good of new snow here and cold.