Picked up an FS45 for almost nothing because it would not start and I like to tinker. Previous owner put in a new ignition because it had no spark. Still no start so he put in a new carb yet still would not start and gave up. I checked a verified spark. Also set gap on ignition as it was a little too large. Thought new carb could still be issue i tried starting with a squirt of gas in the intake and still nothing. I checked compression and it is 90. Spark arrestor is clean, new fuel lines and filter were also installed by previous owner. I think thats everything I know that's been done or checked. I'm stumped as it wont even hiccup. Any ideas out there. Thanks!