Which Engine compression tester to get

Canton_Model_A's

Canton_Model_A's

Senior Member
Morning all.
Trying to figure out what/which compression tester to get to check on the 'A'. I have seen a couple on the typical 'get-it-now' provider and wanted to check with the experts here at the Barn.

Here is what I found, can't beat the price either.

https://www.amazon.com/BETOOLL-HW0130-Cylinder-Compression-Automotive/dp/B00SKSAB8U/ref=b2b_gw_d_puwl_d_sccl_2/133-3764536-6279267?pd_rd_w=93xAd&content-id=amzn1.sym.7879d6e5-9afe-4dbf-ad92-6cd8c343291a&pf_rd_p=7879d6e5-9afe-4dbf-ad92-6cd8c343291a&pf_rd_r=KZSGKGEZ58F996M8AXBR&pd_rd_wg=2E4ZO&pd_rd_r=0be9cf80-ed3c-41df-9a38-165538c6eb94&pd_rd_i=B00SKSAB8U&psc=1

https://www.amazon.com/BETOOLL-Petrol-Cylinder-Compression-Automotive/dp/B087D24FSV/ref=b2b_gw_d_puwl_d_sccl_1/133-3764536-6279267?pd_rd_w=93xAd&content-id=amzn1.sym.7879d6e5-9afe-4dbf-ad92-6cd8c343291a&pf_rd_p=7879d6e5-9afe-4dbf-ad92-6cd8c343291a&pf_rd_r=KZSGKGEZ58F996M8AXBR&pd_rd_wg=2E4ZO&pd_rd_r=0be9cf80-ed3c-41df-9a38-165538c6eb94&pd_rd_i=B087D24FSV&psc=1
 
both will work.
You will most likely need to buy the spark plug adapter from a vendors. Usually the ones that come with tester are to small for a Model A head spark plug hole
 
While I own several electronic measuring tools, the caveat is that if used infrequently, the battery will be dead when you need it at some point. A person should check the battery powered tools on a regular schedule to insure that the battery isn't deteriorating to the point that it will damage the instrument.
 
I use the one from Harbor Freight and the spark plug adapter mentioned by Jack Wingard above.
 
I have 1 from NAPA and Fisher Auto Parts and they both are mechanical and do a good job. As was mentioned above, definitely need the adapter.
 
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I suggest that you opt for an analog compression gauge, and avoid a digital gauge. Tom Endy's article is excellent.
 
Definitely the analog and compare it with a known one if you have a friend with one.
Where I work we have all checked our gauges with one another, you find a bad one
every once in a while.
 
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