craftsman 315 table saw motor issue. need part numbers or specs for capacitors

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Forum topic by parchiba posted 06-14-2021 05:19 PM 346 views 0 times favorited 3 replies Add to Favorites Watch
View parchiba's profile


5 posts in 222 days

06-14-2021 05:19 PM

Hey All, new guy here.
I’ve got a mid 1980s Crafstman table saw, model 315.228.310. It has started having trouble starting to spin up when I turn it on. After watching some YouTube videos, I have come to suspect the start capacitor is bad. Unfortunately I don’t have a DVOM with the ability to test MFD. So, since capacitors are cheap, instead of buying a new DVOM, I’m going to buy new capacitors for about $10/each.

The problem is I can’t find any part numbers or any other identification on one of them. The starter capacitor says “starter”/30MFD/120VAC/Y759, but the other one has nothing on it that I can read. It’s the same size (1.75×3.75 in), but no numbers on it. I suspect it is the run capacitor, but I’m not sure of that.

Oh, the motor pn is M1110211.

I guess I could just replace the start cap, but since I’m in there anyhow, I thought it would be nice to just do both.

BTW, I like this saw pretty well, but I’m not going to spend $150 on a new motor. I’d rather put that toward a new saw.


3 replies so far

View wingless's profile


99 posts in 1078 days

#1 posted 06-21-2021 06:50 PM

Welcome to the forum.

The replacement capacitor doesn’t need to be identical.

The voltage rating MUST exceed the operational voltage, probably not difficult to satisfy that requirement.

It is common that the replacement is equal or exceed the existing. Slightly under will also work.

Life is easier when the replacement matches the original for dimensions and connections, probably not difficult to satisfy.

View MrUnix's profile


8854 posts in 3535 days

#2 posted 06-21-2021 08:17 PM

Unfortunately I don’t have a DVOM with the ability to test MFD.

Fortunately… you don’t need one. Just one that can do resistance. Google it… it’s easy.

Test the caps before throwing money at the problem. They could be just fine and it’s the centrifugal switch that is acting up.


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

View wingless's profile


99 posts in 1078 days

#3 posted 06-22-2021 08:35 PM


It is VERY handy that my DVM reads capacitance.

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