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View Full Version : 1990 OMC cuts out after 15 minutes of run time.



Admeister
07-04-2014, 04:28 PM
Went out today and the boat stalled after about 15 minutes. It's a 22 classic with the 460. Carb is pumping gas but I don't think there's spark. Obviously no ignition... So this engine doesn't have a distributor and I haven't found online what part I would need. Not sure if it's one of the two coils? Or if it's a control module? Anyways, I hung out and worked on my tan for an hour and then it fired up and I got back to the dock. Any ideas? Sound familiar?

BUIZILLA
07-04-2014, 04:50 PM
Smokediver had the cure, PM him within here

Carl C
07-04-2014, 05:17 PM
Smokediver had the cure, PM him within here

You can find him by clicking on the "community" icon near the top of the forum page and click on member list.

Admeister
07-04-2014, 06:03 PM
You can find him by clicking on the "community" icon near the top of the forum page and click on member list.

I tried sending a couple message but they don't appear in my "sent" box. oh well. A problem I'm running into online is the "obsolete" omc parts...

Carl C
07-04-2014, 07:46 PM
I'm a Ford guy with cars and trucks but the 460 needs some work to bring it alive. The stock heads suck and probably the intake and exhaust too. I have no idea what your problem is though and never heard of a distributorless 460. Maybe Buizilla can help point you more in the right direction.

Ralph Savarese
07-04-2014, 08:07 PM
Sounds like crankshaft position sensor or ignition module do a tap and heat test on both with a hair dryer see if it happens at the dock

JayZ
07-04-2014, 11:11 PM
I ditched all the spitfire stuff and went with a DUI HEI marine distributor. ...simplified things.

Morgan's Cloud
07-05-2014, 07:28 AM
Just out of curiosity , before you get into any money spending maybe you could do a test run with the fuel tank gas cap backed off 'till it's slack and see if the problem stops .

mattyboy
07-05-2014, 08:21 AM
I agree with Jayz OMC is a perfect example of breaking the KISS rule ( keep it simple stupid) the wring diagram in a omc ford reads like a NASA manual. I would remove as much of the omc stuff and replace with aftermarket stuff where possible

to me it sounds like a coil issue

Admeister
07-05-2014, 09:30 AM
I ditched all the spitfire stuff and went with a DUI HEI marine distributor. ...simplified things.

How easy was this conversion? I guess there was a lot of wire cutting? And which model DUI did you go with, the racing one?

smokediver
07-05-2014, 11:17 AM
Delco has a conversion kit. I ordered mine from Michigan motors. It's called the delco voyager electronic ignition. Basically u get rid of all the spitfire stuff and put in a electronic distributor. Really easy conversion. It fixed my problem of stalling out.