That's a good point about the Shrader valve. Both of my automotive compression gauges have removable Shrader valves, so you can use the adapter for measuring real time pressure. As you say, with no Shrader of course a small cylinder will appear to have a much greater volume and lower pressure if the length of the hose is significant.

@VintageEngineRepairs

Жыл бұрын

Spot on! Thanks for watching and sharing :)

@niconine268

3 ай бұрын

Yes great tip right there so I won't fall down on that error

👍👍👍👍 10,000 Times. You are helping me survive in the bush in West Africa.

@VintageEngineRepairs

2 ай бұрын

Awesome mate! You’re welcome :)

Very glad you pointed out that the Schrader valve is not a common tire valve. It has a very light spring and is specific to compression tester's 0:22

@VintageEngineRepairs

Жыл бұрын

Yep, quite right Kevin! Thanks for watching :)

@niconine268

3 ай бұрын

Yes very useful to know this truth.

Sometimes we don’t always have a compression checker with us so a shade tree way of knowing if the compression is good enough is place a finger on top of the plug hole. If your finger pops off when turning it over, then you know it’s good enough to operate.

@VintageEngineRepairs

11 ай бұрын

Thanks for sharing,

Your channel deserves so many more subs, really great stuff, I keep coming back to your content to learn more, thanks!

@VintageEngineRepairs

Жыл бұрын

Thank you! :)

Your a very knowledgeable guy Tom, well done on putting out these information videos 👌👍

@VintageEngineRepairs

Жыл бұрын

Thank you Nev!

Got my new Mityvac today and the Whipper snipper I tested a couple of days ago with the other non valved tester has gone from 20PSI to 160PSI. Great info.

@VintageEngineRepairs

Жыл бұрын

Fantastic, there we go :)

As always: Excellent!

@VintageEngineRepairs

Жыл бұрын

Thanks Bud!

Another great video Tom.

@VintageEngineRepairs

Жыл бұрын

Thank you Raymond!

good info and presentation..subscribed.

@VintageEngineRepairs

2 ай бұрын

Thank you :)

Nice video Tom, thanks. 👍

@VintageEngineRepairs

Жыл бұрын

Thanks John :)

Another very well informed video .

@VintageEngineRepairs

5 ай бұрын

Thank you! :)

Great info Tom

@VintageEngineRepairs

Жыл бұрын

Thanks Barry!!

Another great one Thankyou. With all your vids I'm becoming a pro

@VintageEngineRepairs

3 ай бұрын

You’re welcome :) glad you enjoy them!

Well done Tom!

@VintageEngineRepairs

Жыл бұрын

Thank YOU Stella!

Very informative, Thanks.

@VintageEngineRepairs

Жыл бұрын

Pleasure! Thanks for watching :)

Another great video.

@VintageEngineRepairs

Жыл бұрын

Thank you!

I ended up getting a mityvac compression tester with the Schrader valve. The other one I had without the valve I used for years on 420cc engines without issue, but on small engines like chainsaws it did not cut it.

@VintageEngineRepairs

Жыл бұрын

Fantastic James! Good to hear it :) thanks for watching!

@treecycle4631

Жыл бұрын

Just tried mine on a whipper snipper and found I only got about 20PSI. Definitely wrong as it runs perfectly. Time for a new one with the valve for small engines. Thanks for the heads up Tom.

@KensSmallEngineRepair

Жыл бұрын

Another lesson from Mr Two Stroke. Good info Tom!

Great vid mate

@VintageEngineRepairs

Жыл бұрын

Thanks Conk!!

Would that be the MV5530 Professional Compression Test Kit? I cannot tell which one has the Schrader valve at the end for the small engine use. Great video. I have learned lots of two stoke stuff watching your content. Your passion shows! Thanks

@VintageEngineRepairs

Жыл бұрын

They only sell one kit that is analogue :) go with that one 👍

Very cool brother 😎

@VintageEngineRepairs

Жыл бұрын

Thank you :)

Another great video mate. Keep them coming! Is your channel on Facebook as well?

@VintageEngineRepairs

Жыл бұрын

Thanks! Na just KZread :)

Well thank you so much for mentioning the part about the schrader valve. My kit had a schrader valve that you can screw into the end of the line, so it can do automotive and small engine. No other youtube video mentions this important step so I was about to throw the tester out wondering why I was getting 15psi!!

@VintageEngineRepairs

8 ай бұрын

Awesome! Glad it helped!! :)

@mowtoegee7049

8 ай бұрын

Gone from 15 to 150psi! and able to see that my other machine is reading around 100 and probably needs a rebuild. So helped heaps, thanks again :)@@VintageEngineRepairs

@VintageEngineRepairs

8 ай бұрын

@mowtoegee7049 awesome! Pleased to hear :)

It’s a good idea to ground out the plug lead or keeping the kit lol switch off. Some engines have high energy ignitions. If spark can’t get to discharge, it it’s going to try somewhere else like inside the ignition system itself. This can be permanently damaged.

@VintageEngineRepairs

Жыл бұрын

Yep! Spot on 👍👍

Many thanks for sharing. I have taken a punt on a really cheap Husqvarna stone saw from eBay, and I expecting it might need some TLC.

@VintageEngineRepairs

3 ай бұрын

Gotcha :) Husky are awesome, best of luck with it!

@justinf1343

3 ай бұрын

@@VintageEngineRepairs your videos have been super helpful in explaining the tests that I need to perform once it arrives.

@VintageEngineRepairs

3 ай бұрын

Glad you’ve enjoyed them! You’ll get it up running before you know it. Remind yourself to try and enjoy the process!

You wouldn't happen to have links to where we can find the "Small Engine" specific compression testers, would you? All I've come up with so far is ones for "Vehicles" and most aren't as nice as the one I already have, which does have a Schrader valve and adapters to fit different plug sizes. Thanks! And have a great weekend!

@VintageEngineRepairs

Жыл бұрын

Hey! I’m afraid I don’t have any specific links, I’d search the 3 suggested brands in the video and go from there :) Amazon or google will come up with them! Thanks for watching!

@tinkerscorner54

Жыл бұрын

@@VintageEngineRepairs OTC 5604 Motorcycle Compression Tester. That one is a bit pricey, though.

Hi, great video. How are you defining a small engine? does a 1 litre 4 cylinder bike engine fall into this category? Is this why I get low but consistent readings across all four? Thanks

@VintageEngineRepairs

5 ай бұрын

Yep a bike engine, same :)

Hi Tom I have a tester with Schrader valve at the spark plug end just like yours, but I have 200PSI . Isn't that too much ? I looked on Google and said on a forum that 200PSI could indicate a scored piston. Could that be true ?

@VintageEngineRepairs

4 ай бұрын

Na that’s not true, 200 psi isn’t common, its very good though :)

Sorry I am new to small engines and one part confused me... the values for 4 stroke given at 1 min 40 seconds (70 to 80 PSI good). Those values are for an engine with an ACR... or without? Thanks, Matt.

@VintageEngineRepairs

3 ай бұрын

They are with an ACR. With that said, even old engines like Briggs flatheads have an additional bump on the intake (some think it’s the exhaust, it’s not) which will reduce compression too. Therefore even on machines that don’t have an acr, still have a means to reduce compression :)

Good stuff Tom . How is the bread .

@VintageEngineRepairs

Жыл бұрын

Thanks Pete! Good :)

👍💯, if you can send me a Amazon link of your recommendation that would be great. Thanks So many choices

@VintageEngineRepairs

Жыл бұрын

Thanks buddy :)

@VintageEngineRepairs

Жыл бұрын

I’d just google “mityvac compression tester” and opt for their analogue version :)

Yeah... if 80psi and the engine is running great... that just means they are testing wrong Lol

@VintageEngineRepairs

Жыл бұрын

Spot on mate!

@timlong1462

11 ай бұрын

This whole video has me second-guessing my gauge. Currently traveling for work but when I get home I am going to see if I have the Schrader valve in my tester. I suspect I don't as my Johnson 2 cylinder shows right around 100 psi but runs spectacular. my worry is I have given other people advice wrong based off of my gauge.

@GuysPlayingWithTools

11 ай бұрын

@@timlong1462 100 psi is probably the minimum you could get away with, I have seen a few motors along the way that run perfectly nice at 100. If it doesn't have a valve and you are reading 100psi, you likely have a good bit more than that.

*Promo sm*

@VintageEngineRepairs

Жыл бұрын

Don’t understand I’m afraid?