1989 80hp quit suddenly--no spark

[fishkisser99]

Motor's run great all year, but died mid-run as if somebody threw a switch. All electronics kept functioning fine, as did the cranking motor. While putting back on the kicker, I noticed one of the battery leads was somewhat loose. Tightened it; no effect.

1989 3-cyl. 80hp Merc. serial #OC163865

Compression's right around 110 on all cyls.

No spark from any coil.

Rectifier failed the second step of the continuity test.

Stator test (between red and blue) reads 7000; manual states 3600-4200 is normal. Stator test between blue and ground reads 8000; manual states 90-140 is normal. Uh oh.

Trigger leads tested as follows: brown--3500; white--3000; violet--2500 when tested against the white/black lead (in my case, black). Manual states 1100-1400 is the normal range for all trigger leads.

All coils showed continuity between + and - posts when tested against plug lead. Manueal states no continuity should exist.

Am I mistaken, or has the inadvertent omission of a lockwasher on a battery terminal just fried my rectifier, stator, trigger, all three coils, and possibly the switch box?

Neutral start switch (yellow/red) tested okay...disconnected the tilt switch with no effect. Ditto cleaning up some of the connections.

Am I missing something really simple here, or am I simply in for a real expensive and/or time consuming repair job?

Thanks for any advice you might throw my way!

--mja

 

[Laddies]

Re: 1989 80hp quit suddenly--no spark

No, to the loose connection burning out everything but could have burned the rectifier out, have you disconnrcted the black/yellow wire at the switch box to eleminate a short harness and switch, if nor try it and if you still have no spark disconnect the rectifier to see if it's shorted

 

[fishkisser99]

Re: 1989 80hp quit suddenly--no spark

Thanks, Laddies...

Disconnected the red/yellow from the switchbox--still no fire.

Then disconnected the rectifier (2 red, 2 yellow)--still no fire.

I'm a bit at sea as to where to go from here...

--mja

 

[fishkisser99]

Re: 1989 80hp quit suddenly--no spark (update)

Re: 1989 80hp quit suddenly--no spark (update)

Took it to a Merc. Mechanic in Friday Harbor. Diagnosis:

Bad trigger numbers ("...out of #3," he said) and switchbox. Additionally found a cracked magnet in the flywheel, which on a Merc. rep's advice he advises me to replace, though it will effectively double the repair bill.

Reckon I'll be into it for at least $1,000...but isn't that what BOAT stands for? (Bring Out Another Thousand...).

 

[peacekeeper6]

Re: 1989 80hp quit suddenly--no spark (update)

Re: 1989 80hp quit suddenly--no spark (update)

heh, break bring whatever... lol i feel ya.