yamaha 200 no spark

[mark n dark]

1985 200 yamaha wont start.<br />pulled flywheel replaced stator and pulser.<br />no spark. replaced coils no spark. replaced cdi with 4 differant units no spark .plugged in a differant wiring harness to mating plus on engine no spark.replaced rectifier with 4 differant units no spark. changed ignition control unit with 3 differant units no spark.<br />trouble shoot harness checked kill wires on cdi<br />open and close with on off switch and red lanyard. used hand crank megger on all removed parts to check foe cross short ok.<br />removed all black tape on engine wire harness inspeced with fluke ok. removed all ground wires cleaned reinstall. checked for high resistance none found. disconnected overheat and low oil sensors to cdi no spark. held spark plug wires in bare hands while cranking no spark. 3 seta of plugs no spark.can read up to 39volts comming out of stator little or no voltage comming out of cdi to coils(while coils disconnected from cdi). do i have bad magnets in flywheel? or is 4 cdi bad (purcharsed on ebay)please comment

 

[rodbolt]

Re: yamaha 200 no spark

hello<br /> if your ready to trouble shoot I can help but you can toss parts at it a long time and get no where. first thing you HAVE to have is a cd-77 multi meter or its equivalent. some meters have an optional dva attachment. no ign output tests can be succesfully made without one.<br /> remove the white wire from the cdi. that removes all kill circuits and retest spark. if no spark proceed with a stator output test. this is where ya have to use a peak reading meter or a meter with a dva adapter. I dont have my manual here so the numbers may be off but anything over about 70 v is acceptable from the stator.from brown to red with the leads dissconected should be around 75v. from from blue to black/red should be about 14v. the triggers<br />w/r-w/g<br />w/b-w/l<br />w/y-w/br should be about1.6v loaded (hooked up) <br /> if the inputs are good the primary coil wires to ground should show about 58v or so on the CDI output.<br /> I have never seen the mags go bad on a yam flywheel but I guess they can.<br />I would start by carefully testing the output of each subsystem of the ign system.usually by the time I get to the plugs I have solved the problems.

 

[mark n dark]

Re: yamaha 200 no spark

removed the white wire on the cdi was the first thing i tried.using fluke 77 and tested as you said and ony got 39 volts out of stator. the triggers were around 1.5 volts when hooked up.litte or no voltage on all 6 coil wires top left of cdi while hooked up. flywheel was a pain to get off but 3 differant stators were used that appear to be in excellent condition no cracks or burned wiers . used a handcrank megger that tests for cross shorts used to test for shorted wires between primaryand secondary tranformers.can the cdi pull down the voltage on the statorif it is bad.

 

[rodbolt]

Re: yamaha 200 no spark

its possible a bad CDI can load the circuit. not sure if your meter is a DVA type peak reading or not, its in your meter specs. thats why the test is done both loaded and unloaded.<br /> like any transformer if to heavy a load is placed on it the wave form becomes flat. however the statot is not a transformer. dont complicate this simple project. its strictly a ac tothe cdi. the CDI rectifies and stores itthe discharges the capacitor through an SCR when the trigger signal turns on the gate. the discharge is from the CDI out put to the ign coils. thats where the inductive transforming part comes in.<br /> but if your meter is not a peak reading type I have no clue. all I know is most standard meters wont work. its been a while since I played with WVDC and true RMS. I can tell you a RMS scale wont work correctly. I dont know of any magnet tests. I have seen 2 or 3 flywheels in my time that were bad due to weak magnets but none on a yamaha. may be a first. at least used they are cheap.

 

[Ray Neudecker]

Re: yamaha 200 no spark

Always be sure you have a hot battery for testing. I have cured many of these no fire problems with adding a charger to the battery while testing. The parts you have exchanged have a very low rate of failure.

 

[mark n dark]

Re: yamaha 200 no spark

cured the problem of no spark, just purchased new f150 4 stroke hope it lasts 4000 hrs or 20 years as the last motor did.

 

[rodbolt]

Re: yamaha 200 no spark

hahaha that is a sure cure <br /> its a good motor. break it in and maintain it using each and every step on the chart and it should be good for a long time.

 

[Ray Neudecker]

Re: yamaha 200 no spark

Took care of that problem.Happy Boating.