> This is especially true of pump that "burp". When in doubt, use
> graduated mixing cups, and here's a cheap way to make them. This is not my
> idea (I'm thinking Shawn Baker. Whoever it was, speak up and take credit).

I think I mentioned this once--that's about how I graduate yogurt cups! What I really have to take credit for is trusting those stupid pumps in the first place, ruining 4+ pairs of paddle blades. Don't be like Shawn! Always check your mix ratio with a graduated cup!

I use washed 8 oz. yogurt cups for most mixing tasks, and I got some 1.5 oz. and 3 oz. graduated mixing cups from the Wooden Boat Shop for $0.10 each--indispensable for small jobs!

Shawn

> Buy some bulk paper cups at your local Sam's Club or equivalent. Make sure
> they're the wax-free. For $6 you can get enough cups for many boats. Take
> one cup and cut a vertical window in it starting close to the bottom of
> the cup up to an inch or so of the top and about 1/2" wide. Put a 2nd
> cup inside the cup with the window, and using a graduated syringe or cup,
> start adding increments of water to the interior cup and marking the
> levels on the outer cup next to the window. I had to use a flashlight
> shining into the cup to be able to see the level, but it depends on how
> thick your cups are. For the initial marks, I filled in 1/2 ounce
> increments until the marks got too close together (because of the tapered
> cup) and then I switched to 1 ounce increments. Now you've got the one cup
> with the window marked, and when you're ready to mix epoxy, just pop in a
> fresh cup, dispense the resin, check the level, dispense the hardener, and
> check its level. If they're not right-on, it's easy to adjust the levels
> to get the proper amount.

> Ross