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after blowing a lower con rod bearing due to detonation on mag side I found small amounts of coolant in both float bowls. the rod cracked the case and it burned coolant for about 5 sec then died. the failure was on a long climb. ive had a lot of similar failures in both my sleds since switching to premix and for the life of me cant figure out whats causing the deto. still getting the p0376 code on my other trygstad engine. my jetting is 500 main and needle up one shim on stock engine other than full ex and vforce reeds. non eth 91 octane fresh gas. new plugs. no air leaks. now sure how the coolant would get to the float bowls?? even after the engine was burning coolant briefly from the case how would it make it to the carb floats? could it leak inside the carbs from the heater lines???