Testing my Mityvac vs Matco compression test gauge for accuracy. Don't but until you watch this!

My compression test gauge: amzn.to/41lmYW9
A few weeks ago I purchased a Mityvac compression tester and made a video on it where I tested multiple chainsaws to see how it held up to the old "drop test" method. I was surprised by the results and wanted to make sure I didn't have a didn't get a bad test gauge so I borrowed a USA made Matco to do a side by side comparison. Enjoy!
The original video I made can be seen here:
• Small Engine compressi...
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[@mikefennema5561]

It's probably the internal volume of the adaptor assembly.

[@tomycodd]

Thank you for a great video! I have a similar compression test kit but it has the Craftsman brand on it. I have compared testers myself before and found they all max out at the same reading doing 4-8 pulls.

[@mainelysmallengineDIY]

Thank you so much for the kind words and for watching! Yeah I'm really glad I did this for peace of mind. I have one more way I found to check the gauge as well and I'll post a short video on that at some point in the future in case people don't have access to another high end one like this. I got lucky lol.

[@AlexKost-tq6bj]

Thank you for the real life test! Was literally split between the $200+ Lang Tools kit (same as Matco) and the Mityvac, your video helped me save some money!

[@mainelysmallengineDIY]

You’re welcome! Glad it helped you save a few bucks.

[@davidsherrod6498]

Don’t go cheap and get a Harbor Freight. Difference of 60 psi between harbor freight and one I rented from Auto Zone. I will be getting a new one soon.

[@montanakid6134]

Id of hose is larger on the mityvac.

[@mainelysmallengineDIY]

Ok thanks for commenting

[@basimfara]

thanks for sharing the info. Is there a compression test values table? I have an old scooter with a 200cc engine with no information was found on how much should read the compression

[@mainelysmallengineDIY]

That I do not know about but perhaps googling your Model or asking the manufacturer for specs would be the best bet.

[@brianseadoo8307]

What size are all the adapters? Thanks

[@kelton5020]

Rodney is clutch

[@SuperMag357]

I pull the choke, and pull until it won't go up anymore.

[@mainelysmallengineDIY]

Yeah that seems to be the way to do it! Thanks for the input!

[@AustinAudiS6]

Did you make sure the Schrader valve is properly inserted and working in the mighty vac hose? That could explain your issue.

[@mainelysmallengineDIY]

I didn’t but I’ll check it out for sure. It was brand new but that only means so much.

[@kelton5020]

How would you test that? The dial isn't going down, which means the valve is holding air.

[@bennyhill3642]

I dont think there made in usa anymore. But i might be wrong

[@bjejoh]

Amazon link does not work for me.

[@mainelysmallengineDIY]

It could be that you aren’t in the USA but I’m not sure

[@stanleymason8155]

Don't but lol buy auto correct strikes again