You will need some various size barb adapters. The wastegate hose has too large an I.D. for the Dawes.

I slipped a very short piece of fuel hose (from my assortment of sizes, due to repeatedly buying wrong ones from time to time) over the Dawes barb, then sqeezing the waste gate hose over that, then securing with a small German hose clamp. Not elegant, but successful.

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The Golden Rule

1984 300SD (bought new, sold it in 1988, bought it back 13 yrs. later)