OMC Guru's---Dhadley, Walleyehead, anyone....

[Basscat 1]

Re: OMC Guru's---Dhadley, Walleyehead, anyone....

I was just wandering if you ever fixed your problem?

 

[tysidor]

Re: OMC Guru's---Dhadley, Walleyehead, anyone....

Sorry I didn't get back to everyone on this. I ended up bringing it to an outboard mechanic. He has now had it for a couple weeks. He made a deal with me that if he didn't figure out what was wrong he wouldn't charge me. I talked to him a couple days ago and he still hadn't figured out what the problem was. It kind of sounded like he was stumped. I will keep everyone informed of what he finds out.

 

[glen357]

Re: OMC Guru's---Dhadley, Walleyehead, anyone....

tysidor,<br />I am new, so please excuse me. But did you change the power pac. Or does it even have one. I had a 140hp that acted very much like yours. It would only act up at hi speed. G

 

[classicboats]

Re: OMC Guru's---Dhadley, Walleyehead, anyone....

Hi, do you have a merctronic tachometer. If so how do the 2 leads coming out of the bottom hook up ? To what and where ?
Thansjk Art

 

[Benny1963]

Re: OMC Guru's---Dhadley, Walleyehead, anyone....

ihave a 1981 150 crossflow had same prob couldnt get over 4500
come to find out my tach was off 600 rpms
wich put me a 5100 40 mphs on a 1979 mckee
changed to larger fuel line rebuilt fuel pumps tore down soaked and rebuilt
carbs with special att to high speed jets , it now runs . 5800 rpms at 46 mph with a 19 prop[.
thanks benny b

 

[CharlieB]

Re: OMC Guru's---Dhadley, Walleyehead, anyone....

Sorry I didn't find this thread sooner

Beg, Borrow or buy a DVA Meter and test your stator.

Another simple test is to draw out the spark to see how big a gap you can get.

The clues where limited rpm under load

yet unloaded you reved it significantly higher.

It takes serious voltage to bridge the spark plug gap at full load versus 'unloaded', the actualy cylinder pressures are totally different, more load AND more rpm = higher PSI which requires an increasing voltage to bridge the gap.

Most of these ignitions will throw almost 1 inch spark at high rpm

get the meter, prove your stator weak, then replace it.