Had a problem with no idle in the water and on the muffs. Cleaned the carbs with no change. Decided the next cheapest method of repair was a fuel pump rebuild and replace the fuel line. Did both today and stuck the muffs on it and she will idle now. I haven't a clue which replacement did the trick but I did need to return the idle enrichment screws back to 1 1/2 from seat where as before I had them out several turns. This should help at launch time.