Quote:
Originally Posted by shawn.m
been doing it for 30 years on everything motorized. put spark plug on block and crank it. how does that blow out to TCI?
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Shawn..I have no doubts of your mechanical skills, My suggestion to use a spark tester is to save members possibly alot of money. Yamaha's from 1979 (G1's) thru 1995 (G14's) used a "CDI or TCI" electronic ignition sytem. It is based on open/closed ground. If by chance, when grounding a spark plug for a spark test and the spark "jumps or loses ground" It "can" and "has" many times damaged the "CDI/TCI" unit. There is no fix, just open your wallet and buy a new one. In 1996 Yamaha (G16) went to a "magneto" ignition and you can ground the plug to check for spark without damaging anything, but I still use a dynamic spark tester, it shows me a veriaty of things...the engine is running and it shows "spark strength/color and if spark is lost at some point". Hope this explains my suggestion alittle better. Dave