Gonna try to make this as short as possible.I have a M70B that was sunk back in March.Did the usual such as flush out cylinders.etc. etc. It ran fine up until recently.Lost all fire and took to dealer.He said my stator went out.Think he replaced with used stator unit to help keep costs down.Got boat back home but was still not 100%. It had weak response and had to trim down to plane and then trim back up to get 25MPH at 4000 RPM.Usually runs about 38MPH at 5400 Rpm. I found bad coil and replaced.Ordered repair manual and test meter.Found timing off,according to manual,about 5 degrees.cleaned carbs,and performed ignition tests.Took boat out and response was good but could only get about 32MPH at 4900 RPM.Would blow out if I tried to gain more RPM's.Better, but still not 100%.My manual is a Clymer which came with a supplemental for the peak voltage and ohms tests.Want get deep into the reasons why, but it appears some of supplemental is right and some is wrong.Book appears to be same way.Wish I had found Tohatsu book first!Compression test is good,at 118PSI to121PSI.Foot seems okay and is not believed to be putting strain on engine. My book (supplemental) says pulser coils should be 162V to 405V and I'm getting 104V on all three.A few volts(5-10) lower might not worry me but this seems like a large gap if indeed my book is right.Now for my questions. (1)Should I look further at pulser coils?(2)Even if my CDI is showing correct peak voltage, could it be firing out of time and/or intermittenly and is there a way to test for this?(3)Can someone send me the ohms and peak voltage specs for ignition tests?(4)Anyone have any ideas for further troubleshooting.I don't believe engine speed limiter is problem because it is running well over half speed and RPM's, but thinking about pulling limiter connection for test run.
Sorry for such a long post but about to pull hair out !Thank everyone in advance for any advice/ideas or information.
KR308
Sorry for such a long post but about to pull hair out !Thank everyone in advance for any advice/ideas or information.
KR308