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Old 11-17-2008, 06:58 PM
Pater Pater is offline
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bad design of exhaust system?

The 1969 Irwin 28 CIB I have has an A4 with a water-lift muffler. The problem I'm having is two fold. Water flowing back into the exhaust manifold and thereby into the engine and hard starting. The more I've looked at the design of this system the more I think there ought to be a dry loop ahead of the point where the water from the exhaust manifold jacket gets sprayed into the exhaust hose.A) Has any one else had this problem? B)Would the addition of 3- 90 degree elbows a 3 inch long nipple to gain height above the manifold, a close nipple to join the pair to form the loop, and a 4 inch nipple to lower the attachment point for the water injection point so it's below the manifold oriface by at least half an inch, solve the back flow problem?
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