Hi this motor is on my starcraft 17.5 foot pro bass boat the stator trigger are good but still no spark yet any good wrench guys on here for old mercs thanks.

How about coils and wires? There was also an emergency "switch" on my 75hp that wouldn't allow spark to the coils. The switch is meant in case you hit something and the motor jerks it would sense and shut off all power. Unfortunately, if the switch goes bad then no spark either as was my case.

I'm by far no expert on them but I do have an 88, 115. Mine died on me a few years ago while in Floridaand it was because the idle control module shorted and took out the stator low speed winding, and both trigger modules. You do know there are two sets of windings in the stator, one set provides low speed signal to the trigger modules, so if you are positive the trigger modules are good, then you might want to check the stator. Might also want to disconnect the idle control module, it's not required to run, just to make sure yours hasn't pulled the same stunt mine did.

I have had several Mercury outboards from that time.  I had a 35 HP, 50 HP, a 75HP  and a 115 HP..  They share a lot of parts just more as the number of cylinders increases. If your 115 is the inline 6 115 then have your dealer check the power packs( ignition modules)  I know that in the 1986 and 87 models they had a batch issue.  Over the years I replaced a pack in each engine.  If you replace one pack replace them all as the weak ones will fail shortly.  After replacing them I never had to do it again.  The symptom was always like a dropped cylinder and a loss of spark in that cylinder.  If that is your issue the repair is pretty simple, just costly.

Thanks guys stator checked good but the trigger was bad I found a bunch of switcheboxe's fairly cheap 100.00 or less the motor only had spark on cylinder 2/4 nothing on the rest would a bad trigger do this or combo trigger/power pack thanks. Junebugman

Thanks guys stator checked good but the trigger was bad I found a bunch of switcheboxe's fairly cheap 100.00 or less the motor only had spark on cylinder 2/4 nothing on the rest would a bad trigger do this or combo trigger/power pack thanks. Junebugman

I hope this link works because it sounds like the same problem you are having and is a pretty good discussion on the matter.  http://continuouswave.com/ubb/Forum3/HTML/020581.html

I read it those guys jmh etc seem like they know a nut from a bolt lol thanks! Junebugman