Powermatic 66 Won't start

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Forum topic by Hippockets posted 440 days ago 896 views 0 times favorited 5 replies Add to Favorites Watch
View Hippockets's profile


86 posts in 1709 days

440 days ago

I have a 5 HP single phase 220 Powermatic 66 that won’t start with the start button. However it will start when I take the cover off and press the blue button. As a first step I replaced the Capacitors. That gave me the capability to start it with the cover off. The start button actually depresses to the right of the blue button

-- Bruce, Arnold MD

5 replies so far

View mrg's profile


519 posts in 1601 days

#1 posted 440 days ago

The blue must be a safety the way you are describing the symptom. Is there an actuator on the cover that depresses the blue button? Does the start button hit the white button or the blue?the blue looks like the start button should sit in the indent in the middle.

Can you click a pic of the back of the cover?

-- mrg

View muleskinner's profile


662 posts in 1038 days

#2 posted 440 days ago

Does the saw keep running after you push the blue button? The blue button is actually the magnetic starter contacts. Once you push it in it should also close the coil circuit and continue running until you press the stop button. If it doesn’t stay in, check the stop button contacts (with the power off of course). You should have continuity through the two red wires directly below the red button.

Edit – Oh, and try pressing the reset button.

-- Visualize whirled peas

View Loren's profile


7259 posts in 2250 days

#3 posted 440 days ago

Those magnetic starters aren’t expensive.

They are mechanical and very reliable, however
oxidation of contacts can occur over time.
Contacts inside which can be cleaned
with fine wet/dry sandpaper.


View REO's profile


581 posts in 676 days

#4 posted 440 days ago

the contacts below the red button you call out as number three should be closed they are labeled NC. these are the closed contacts of the start circuit. try pushing the blue button to the left of the red button #3. this is a reset for over load condition. if you had to replace the caps it probably overloaded trying to start previously. it depends on the contactor some times you have to turn the blue button and then restore the position to reset but most of the time just push it once.

View shopgirl21's profile


1 post in 372 days

#5 posted 372 days ago

I have the same issue with my “new” model 66. However, I tried pressing the blue reset button on the bottom right next to the stop switch ant it didn’t do anything. Is that reset button supposed to be flush with the housing? mine appears to be popped out.

I can get the saw going by pressing the blue button (#3) and holding for a few seconds but pressing the white start button(#1) only produces a humming noise while i hold the button in and does not turn the motor.

Any thoughts on the problem?

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