PS apologies for the long ranting. Sunday afternoon here and I was *literally* waiting for paint to dry. I’ll try to reel it in…
Where can I get or what is the name of the tool you use to screw into the spark plug hole?
The Stihl compression tester is usually around $100 US. I just googled what it looks like and the part # for it. It’s an excellent excellent tool but it will only work on small motors—if you want it for measuring compression in cars or motorcycles or whatnot it probably won’t be able to reach the spark plugs. But for chainsaws and small motors there is no “better” tool on earth:
and is of the same quality. 
You can knock the guts out of a spark plug & JB weld a hose barb into it.
I remember making one of those in high school with JB weld… LOL… it worked great!!!Repeating what has been done for decades- possibly even made a video.
Can dispense with the nipple and epoxy a bit of silicone tube into the old sparkplug remains- pump plugs directly in to.
Plenty of ways to skin a cat.
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Yep and let m e guess- high school preceded youtube?
Grin. High school pre-dated YouTube, the internet, cell phones, CD players… the whole bit
Uh in addition to a lot of other things, pulling the spark plug requires one tool and takes less than sixty seconds… while removing a carb is a much more involved endeavor… (shrug)
A side note, but on topic - avoid blocking the intake with rubber between the manifold and carb. Often the manifold warps and causes a leak that gets sealed by the rubber. Always use the correct block off flange. I have 1 which fits 95% of the machines I work on. I’ll find a link shortly.
Good, short to the point video. I didn't know The manifold had to be blocked off if the carb was left on. So, so you say NOT to use rubber between intake manifold and card as done in the video?
I just used old spark plug, ground off the flare that hold the porcelain in. Removed the Porcelain and tap with 1/8 NPT and screw in a brass nipple.
Thank you! I don’t recommend it now, no. I have had a few friends and noticed people online too, can get false readings from doing so and it can cause you to chase your tail. If at all possible, purchase yourself a proper block off flange. I’ll make an update video at some point.
What about removing carb and placing O-ring larger than opening of intake backed by a metal plate held in place by the carb mounting bolts?Thank you! I don’t recommend it now, no. I have had a few friends and noticed people online too, can get false readings from doing so and it can cause you to chase your tail. If at all possible, purchase yourself a proper block off flange. I’ll make an update video at some point.
Lots of people still use rubber there, but it’s just something that can possibly set you up for missing a possible leak. The only place to really use rubber is between the exhaust port and muffler.
Lots of people still use rubber in the intake, but I tend to stay away from it wherever possible.
Hope this helps
No. Don’t use anything other than a flat piece of metal. No rubber gasket, seal, o-ring or anything. A metal flange directly pressed against the intake gasket or manifold just as the carb would.
