Any suggestions on what will cause my motor to almost stall at slow speeds? It happens mostly as I am just above idle speeds to keep my wake to a minimun. It seldom dies but will come close to it for just a second then return to normal.It will also drop or raise rpms occasionally at higher speeds. It runs well but for this. Could it be the fuel pumps going out? The carbs were cleaned and new plugs installed recently. Thanks for any advice!