Reply To: Backfire/misfire thru carb

[Don]

I am assuming that when you blow through one of the thermostat pipes/hoses, the other hose is still connected to the other head. If so, what you describe makes sense. The water can not get out its intended exit through the unit, so it just sneaks out of the other thermostat hose, re enters the other head, and exits through the opposite open head…
I think you need to concentrate on the thermostat housing and where the water is supposed to exit from that adapter housing(s). I am not familiar with the actual cooling flow through the turbo jet unit, but it shouldn’t be hard to figure out with the engine/adapter out of the boat. I’m guessing the passages in that adapter housing are full of sand.
Not sure what you have for a flywheel puller, but I wouldn’t chance using it, unless it is the OMC puller and proper hardware. I’m sure you have some friends at local repair shops, they probably have the OMC puller. I would just put the engine in the truck, take it to one of your friends, he will pop that flywheel off in a minute or two….