Sport Jet 175 x2 with low compression

[Scott Danforth]

I will read up on my settings my carbs.

I was lied too! I was told those testers were worthless.
No matter what, I am going to use an ir thermometer.
If some of the cylinders are not firing, that would be an obvious reason the rpms are low.

here you go

8 in one adjustable gap tester https://www.amazon.com/CDI-Electronics-511-9766-Enclosed-Adjustable/dp/B002IZFSSO/

the single that I have been using for decades https://www.lislecorp.com/specialty-tools/ignition-spark-tester

your manual will tell you specifically the minimum gap the spark must jump. for example, some motors must jump 7/16" or 1/2"

 

[Scott Danforth]

I have not used these - which product/manufacturer do you recommend?

Ring Free is a yamaha product
power tune is a Mercury product

 

[rossman21]

Thank you!
I have never heard of these products - I thought you were talking about a procedure to do on the engine...