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Yamaha stern drive yems ignition

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Scott Stephens

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"ANYONE HAVE A CLUE ABOUT TROU

"ANYONE HAVE A CLUE ABOUT TROUBLESHOOTING?
just completed manifold swap on 4.3L V6 and lost spark @ #1, #4 cyls. cam sensor hall switches look o.k. (008) all harness plugs clean. all sensors ( h2o temp,& flow, oil pr.) working.
upper hall switch in cam pos. sensor doesn't appear to have any affect on anything. what the heck is it for? engine ran on all 6 before work
was done. sat for 3 mos. waiting for yam. manifolds before swap. by the way, I dont recommend it, major problems fitting."
 
"for anyone searching for answ

"for anyone searching for answers, this is it. rip it all out, install delco h.e.i. dist, & coil, & wireset. and don't buy any more wierd crap. yamaha should be ashamed for sending this junk to our country."
 
"I came real close to doing th

"I came real close to doing that (actually, both your suggestions) - I have a 91 YEMS V8... lesson I learned - research used boats better before buying."
 
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