George - Wish I could find a qualified Yamaha tech to work on them. The one I tried knew less than I do. The good mechnic I had found moved out of the area I've heard some good reports about the shop on Kent Island, but I have no way to get the boat there (no trailer and they have no water access), and their on-site tech was booked a couple months out making it pretty unusable. It has the spec plugs, checked and all but one was burning right one (one had some carbon foul, found the idle screw on that carb was too lean). Also replaced all the plug caps last year as found a couple that had gone bad. I'll look at the manual and see if checking the stator is something I could undetake or not. I've rebuilt the carbs before, but I can see fuel coming from the high speed ports this time, which was the problem when they clogged before.
First Gun - The carbs were drained for the winter storage to prevent them gunking up.
Garry - There are 3 pumps per motor, they were replace about 50 hours ago. I don't realy have a good way to test them. The mechnic who found a bad pump then has left the area, and I'm having a hard time getting anyone else with a good reputation to call me back.