Carbon build up is really bad on this KD 15. Something to check if working on one of these motors. 8to1 gas oil ratio and 40w oil sure made a mess in this one. I am trying to clean the down tube in the lower unit. I cannot get a wire down it yet. I am soaking it with gumout. Hope it loosens up over night. Probably better cleaners for carbon removal but, I am using what I have.
dale
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