Is this top of line ?

It's, as far as I know, a unique product. No-one else makes anything quite like it (as a handheld, one-box solution). I've got one, and it's a fantastic time-saver. I can do a quick look at four cylinder's worth of ignition waveforms in twenty seconds. To do the same thing with my Snap-On Verus (five grand's worth) takes five minutes to boot, then a couple of minutes to find and plug up the adaptor, then another minute to configure the scope mode. And I gain little or nothing more by doing it with the Snap-On tool than using the GTC product.

Will this work on a single cylinder lawnmower engine to read rpm? If so what setting would you use?

The problem is that when the unit is in tach mode it reads the wrong RPM’s because you you can not set it for the number of cylinders that your engine has. It’s permanently set for “8” cylinders with no way to change it to “1”, “2”, “4”, or “6” cylinders so that the tach function will read correctly. You have the option of setting the unit for a 2-cycle or a 4-cycle engine so why can you not set the number of cylinders?

Does this product have a warranty besides the 4yr protection plan?

Yes, the GTC505 comes with General Technologies Corp's standard product warranty, which lasts 1 year (from date of purchase). Please visit the GTC warranty page for details https://gtc.ca/warranty.html If you have problems after the warranty period, please contact the manufacturer, as GTC can often provide replacement parts, or repairs.

Can this be used to set ignition timing instead of a timing gun?

Nope. There is no strobe to illuminate the timing marks on the vibration damper.

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⚡ Ignite your engine diagnostics with precision and confidence!

LIVE IGNITION WAVEFORM - Visualize ignition patterns in real time for instant troubleshooting.
PRECISION SPARK DIAGNOSTICS - Measure peak voltage to pinpoint coil faults with unmatched accuracy.
INTERMITTENT ISSUE DETECTION - Compare cylinder data over hundreds of sparks to catch elusive misfires.
TIMING PROBLEM IDENTIFICATION - Detect lamp time and dying angle to optimize ignition timing perfectly.
UNIVERSAL ENGINE COMPATIBILITY - Works seamlessly from 2-stroke magnets to modern computer-controlled coils.

The GTC505 Engine Ignition Analyzer is a handheld, professional-grade diagnostic tool that delivers real-time ignition waveform analysis, peak voltage measurement, and advanced chart comparison to detect intermittent faults across all spark ignition engines—from simple 2-stroke motors to sophisticated computer-controlled coil-on-plug systems.

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Brand	GTC
Power Source	Handheld
Automotive Fit Type	Universal Fit
UPC	833303000688
Global Trade Identification Number	00833303000688
Manufacturer	GTC
Model	GTC505
Item Weight	2 pounds
Product Dimensions	6.5 x 1.4 x 4.9 inches
Item model number	GTC505
Batteries	1 Lithium Ion batteries required. (included)
Manufacturer Part Number	GTC505

General Technologies Corp GTC GTC505 Engine Ignition Analyzer

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