The 1550s don't have an accelerator pump. They're the old Marvel carb.
Does it idle OK? For some reason I always have to keep mine choked a little. The 1600 is the same way. Is yours better after it warms up some?
I had trouble with mine idling rough and it was sucking air where the intake manifold bolts to the exhaust. You might check for leaks there and for intake leaks where the manifold mounts up to the head.
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Today's Featured Article - Tuning-Up Your Tractor: Plugs & Compression Testing - by Curtis Von Fange. The engine seems to run rough. In the exhaust you can hear an occasion 'poofing' sound like somethings not firing on all cylinders. Under loaded conditions the tractor seems to lack power and it belches black smoke out of the exhaust. For some reason it just doesn't want to start up without cranking and cranking the starter. All these conditions can be signals that your unit is in need of a tune up. Ok, so what is involved in a tune up? You say, swap plugs and file the points....now tha
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