91 nautique electronic ignition prob

My 93 would sporatically shut down to limp mode as well. I checked everything but the answer in the end was a bad oil pressure sending unit.
You can bypass the temp sensor and the oil pressure sensor by leaving the wire unconnected (I think it was open, not shorted). If you do this you do leave your engine unprotected, but for trouble shooting it helped me out. The gauges are off of different sensors so the dash will look fine but the input to the module makes is think the engine has a problem, hence the limp mode to get you back to the dock. It would idle fine but if you tried to crank it up it would stutter like half the plug wires were off. The only way to clear it was to turn the key off and back on.

Nothing on my units got hot but the local dealer did have a used coil pack and module on the shelf that I used to test. Once I eliminated the pack, I switched to checking the sensors and found it by process of elimination.
A check of the sensor with an ohm meter showed it had like 10 ohms to ground when the engine was running. It should be basically infinity or an "open".

Billy: I heard that you have talked to my son. I figure you and him can speak the same language. He had lots of good stuff to say about the conversation. Thanks for treating him right.

john

skiwoods wrote: I have a 91 nautique with electronic ignition. After it gets hot it will not atart until it cools. The large module for the electronic ignition at the rear of the 351 Ford gets extremely hot when this happens. Will replacing that unit solve my problem or is something else causing it.                  Skiwoods

Skiwoods, what did you end up doing to resolve this issue??? My boat is doing the exact same thing, thanks!

I have a '91 Nat. Excel with only 240 hrs. I have the same problem where my boat shuts down to 2500RPM. I gues that I will have to change the Protec over to the Retro Kit. Does the Kit come with instructions? If not, has anyone done the conversion or is it to complicated and should I bite the bullet and take it to a Dealer?
Any help would be great.

Woodyz

TRBenj wrote: 79Tique wrote: Skiwoods, I don't know much about the Protech's, but I'm thinking this could be as simple as a bad coil. My 94 had the protech system converted out before I owned it. Unless there is something about the protech that would suggest other wise I would try a new coil first ($20.00). While the problem very well could lie in the coil, the Protec doesnt utilize a standard coil. It uses 4 coil packs, which are NLA. Youre only bet is to find them used from someone else who converted.

unlike GM's system where you can replace the packs on the protect it's straight up replace the whole unit, same deal on the early buick units in cars. It contains individual coils that are in one potted assembly, module and all, typical of motorola's design so this makes it non-servicable and makes it a tosh the old and replace with new no in between.

Skiwoods,

I don't know much about the Protech's, but I'm thinking this could be as simple as a bad coil.

My 94 had the protech system converted out before I owned it. Unless there is something about the protech that would suggest other wise I would try a new coil first ($20.00).

To 79 Tique,
               After it has run for awhile it will sometimes shut off. At other times it won't restart after I have shut it off.
                   Skiwoods

Does the boat shut down on it's own or do you shut it off and it won't restart?