Get yourself a yellow & black Believer and a 10" Pumpkin Seed Jake and troll them about 10' behind the motor in the prop wash. They catch a lot of fish.
For casting, you'll never go wrong with a large black spinnerbait with orange blades. It was always the bait I started ever day with a did very well with it. Twitch baits also work well for casting, move them fast and erratic with long pauses.
Don't go crazy buying a bunch of baits until you find what works.
I just took a carb apart from my log splitter and it actually had rusty parts inside. The ethanol in gas is going to cause a lot more of these issues.. you may be able to get it to run better with seafoam but I'm betting that the carb will need a more thorough cleaning.. I use simple green (the purple stuff only) and it is fantastic for de-greasing and cleaning carbs.. even better if used in conjunction with an ultrasonic unit
Do yourself a favour and hit the Kawarthas. Gbay isn't a very forgiving place for new muskie anglers.
As far as baits.
Double 8 bucktail
Glides,
Dive and Rise (Suick)
Spinnerbait (Lubowski, Spanky, etc)
Rubber