Can anyone direct me to a source for service info on Kawaski's. I have a 25HP (FH721V) on Wright Sentar 61". A tree branch struck the linkage of cables on the carb - now the engine sputters, recovers and surges then sputters again. I'd like to be able to service this myself, now and in the future, but I can't find any repairadjustment info for this model.