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View Full Version : Yamaha stern drive yems ignition



Scott Stephens
04-19-2006, 04:08 PM
"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."

scott_s
05-15-2006, 11:32 PM
"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."

scott_s
05-15-2006, 11:35 PM
"even better idea, buy insurance from japanese company and sink the b#%&#"

tmbrown
06-17-2006, 07:17 PM
"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."