by Mike
(Chicago)
Don't know year number. Engine backfires at neutral idle. I cleaned the carbs a couple weeks ago and took it out and it ran great. Came back today intending to pull it out and launch at a different lake. Boat sits in water normally so I drove it 250 feet to the launch and it's on a trailer now. When in gear it doesn't backfire but in neutral it will backfire a few times then eventually die from one, and it is developing a squeak. All cylinders have seemingly good spark. Fuel pump seems to pump well. Any help would be greatly appreciated