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View Full Version : 78 200hp evinrude no spark on one bank


quickonstep
05-07-2004, 06:10 PM
as the title says... i havent replaced anything.. but on the port bank i get a nice blue spark, on the starbd bank, i get nothing..

any idea's?

Powerpack maybe?

Suggestions welcome, answers needed!

Jesse
bulldogdaddy
05-07-2004, 08:07 PM
damn jessie,i wish i knew more about motors,but all i know is they cost alot,and are a pain in the ass to maintain.
hope a few ppl respond to this
did you get the new stator?
and can't a few of the guys at the marina give you a few tips or is that a expensive question?
VectorPat
05-07-2004, 08:24 PM
Most likely its a power pack and its possible for it to be the pack on the opposite side. They have an isolation diode in them that goes bad and cuts out the opposite side, so its best to change both of them..
quickonstep
05-07-2004, 08:34 PM
bob, i have the boat here at the house so no help from those guys.. and besides, if i did get help it would be "40 bux an hour" and a buddy of mine was giving me a hand but was unavailble today..

Well the packs are universal correct? i mean if it doesnt work on one side i could always switch it out.. i know i have one good working one... but i guess that wouldnt help if a diode was bad.. is there anyway to test these things?

Thanks vectorpat!
VectorPat
05-07-2004, 08:44 PM
If my memory serves me correctly ,with the pack disconnected check for continuity between the white wire and black/yellow wire on the pack.. You should get a reading one way then reverse your meter leads then you should get no reading or open.remember you are checking a diode.. If you have a known good pack you can try it on each side to see if that fixes it.. Anther way is to disconect the pack that is firing and recheck your spark on the other side to see if it returned..there are several ways to check this system just depends on what you are comfortable with..
quickonstep
05-07-2004, 08:57 PM
on the wires that connect to the pack, or where the pack itself plugs into (at least i think thats how it works)?

Jesse
VectorPat
05-08-2004, 11:57 AM
The diode is in the pack, so you will be checking the wires coming from the pack.. It doesnt even need to be on the motor to check it.
quickonstep
05-08-2004, 02:05 PM
checked both packs, on the white and black/yellow wire... continuity one way, nothing the other way, and its that way on both packs... but it seems like if it was a stator or what not, it wouldnt just drop one whole bank... at least thats kinda what im getting... but really makes me point towards a powerpack... i can pick one up locally, used for next to nothing, thatll be garenteed to work... but if thats not the problem.. i dont wanna spend the money on somthing i dont *need*


Any other suggestions?

If anyone feels helpful and they would like to call, gimmie a ring 443-421-9892

Jesse
kubelwagonman
05-08-2004, 02:51 PM
that yr motor is isolated packs,that guys thinkin of a merc...switch ur packs,if u pick up fire than more likely than not its the staor but could be the trigger......usually those dont go bad though
VectorPat
05-08-2004, 10:24 PM
No i am not thinking of merc packs.. The older omc's did have an isolation diode in them..Believe me i know.. It may not be the problem in this case but it is common for them to do this.. It still is probably a bad pack.. Just swapping them around will prove this, but if the diode is bad the opposite one will kill the other.. it sounds like he tested it correctly and that the diode is good in each pack.. so the pack that is not firing is probably bad....
quickonstep
05-08-2004, 11:47 PM
ok i bought a stator off ebay, new, cuz it was 50 bux... and i figured thats a hellava price for a new stator... so i picked that up, ill go up monday morning and get a powerpack, and fingerscrossed... itll work :D

Jesse
H2OPERF
05-09-2004, 07:36 AM
The omc packs do have an isolation diode but if its bad they will idle fine and miss like the motor is coming apart at about 2000 rpm.I would have swaped the packs first if you dont have any test equip, it could be the stator it has two separate ignition charge coils one for L one for R bank, that was a good deal on the stator.Dave
VectorPat
05-09-2004, 09:05 AM
Basicly it comes down to the easiest test to do would be to swap the packs around.. If the problem moves then its one of the packs.. That is true about the diodes killing it over 2000 but I have seen them do it as low as cranking speed..
quickonstep
05-09-2004, 11:29 AM
well i think the diodes are good, astested, so i think its someplace else... ive heard that triggers usually dont go bad... but they do have there days... if the new stator/powerpack doesnt work, then ill just pull the flywheel again and replace the trigger. I just want this thing runnin... THEN i think i forgot to tell yall.. while i was testing spark, on the bank with spark, on the bottom hole, where a new coil is... i pulled the plug boot off, and let go of it and it fell off the coil GRRR... so i shoved it back up there, and it had good spark, so i 5200'd it in there...

boats give me a headache!

Jesse
bulldogdaddy
05-09-2004, 12:55 PM
and i thought i had problems,lol.:D
quickonstep
05-09-2004, 01:12 PM
hey bob, ill stop by tonight to pickup the motor your going to loan me HAHAHAHAHAHAHAHAHAHAHAHAHAH

you done with that boat yet? whats the hold up? whats taking you so long... a excuse of "oh the resin takes time to dry" aint no excuse.. or "the paint isnt on it " blahblahblah... excuses excuses

:D :D :D :D


Jesse