Determine correct capacitor

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Forum topic by Robert posted 12-05-2020 11:32 AM 297 views 0 times favorited 5 replies Add to Favorites Watch
View Robert's profile


4330 posts in 2456 days

12-05-2020 11:32 AM

Where do you suggest I go do replace this capacitor?


Is this the run capacitor?

It get extremely hot and I’ve had to push the motor reset button several times. Looks like there is some gooey stuff protruding front the end where connecting tabs are.

-- Everything is a prototype thats why its one of a kind!!

5 replies so far

View Fred Hargis's profile

Fred Hargis

6746 posts in 3469 days

#1 posted 12-05-2020 11:52 AM

The easy thing to do is take it to a motor shop and ask for one. Sometimes when you order one on line that meets the specs, it’s a slightly different size and won’t fit into the cover.

-- Our village hasn't lost it's idiot, he was elected to congress.

View OldBull's profile


309 posts in 271 days

#2 posted 12-05-2020 01:40 PM

Be aware that big capacitors store a painful amount of electrical charge, so if you touch it in the wrong way you are in for an awakening, and not a good one.

The bottom image looks like the motor, the top image looks like the motor run capacitor, 50 micro farad 370 volt

Also note that in electrics/electronics capacitors are sometimes over stressed by other problems.

View CaptainKlutz's profile


4015 posts in 2470 days

#3 posted 12-05-2020 03:00 PM

50uf is right range for run capacitor on a 5hp 1PH motor. Start capacitor will be ~10-12X that value.
As long you get one with same value, and same or higher voltage, will work fine.
Hard part with motor caps is size restriction.

+1 Easy and best way to get replacement is to visit local motor shop
Might charge $20-30 instead of $10-15 on Amazon, but you will get right size and decent quality part.
Another local source for motor capacitors can be local Appliance parts supplier.
Grainger, or Global Industrial also carry some motor capacitors.

Be sure to check your housing width and length, so you will know if you can use longer/larger cap if needed.

Best Luck!

-- If it wasn't for bad luck, I wouldn't have no luck at all, - Albert King - Born Under a Bad Sign released 1967

View Madmark2's profile


2096 posts in 1564 days

#4 posted 12-05-2020 03:13 PM

Don’t run it until you change the cap. There is a small risk of explosion or fire. Once the cap is oozing, its done.

With the saw unplugged short across the tabs with an insulated screwdriver to fully discharge the cap before servicing.

-- The hump with the stump and the pump!

View MrUnix's profile (online now)


8361 posts in 3175 days

#5 posted 12-05-2020 07:46 PM

$16 with free shipping for what should be an exact replacement for that capacitor -from ebay. Can probably find them elsewhere as well.

CDE 50uF CAPACITOR 370Vac on E-bay


-- Brad in FL - In Dog I trust... everything else is questionable

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