wire crossed on altanator/causing engine kill at 2500 rpms?

[karayj]

Could this be why I have no power and it stalls and dies over 2500 rpms or that i can just idle around and not psut the throttle more then ahlf throttle before it dies. I just found out the wires were crossed on the altenator<br />the purple wire that goes to the coil and the wire that goes to the the ignition were worng on the back of the altanator i did not think it made a difference but i will try it and see if it helps. I thought on the back of the alt they are both positive but I have 4 contacts 1 neg 2 orange to the starter 3 red/purple the ignition switch 4 purple to the pos coil could that be the problem lack power and causing the motor to cut off at 2000 rpm and above <br />--------------------------------------------------------------------------------

 

[Bondo]

Re: wire crossed on altanator/causing engine kill at 2500 rpms?

I Doubt It......<br /><br />It Sounds allot More like a Fuel System Issue....

 

[karayj]

Re: wire crossed on altanator/causing engine kill at 2500 rpms?

changed the fuel pump checked the filter i will check the pressure whats should it be

 

[Bondo]

Re: wire crossed on altanator/causing engine kill at 2500 rpms?

Fuel pressure Should be 5/6psi at the carb inlet.....<br /><br />Reading your other posts, I suspect the "High-speed Circuit" in your carb is Not working propperly......

 

[CharlesW]

Re: wire crossed on altanator/causing engine kill at 2500 rpms?

Seasprite:<br />It may not be your problem, but about 20 years ago, I had an OMC Chevy V-8 that had very similar symptoms. <br />It turned out to be a tachometer with a short in it. When the ignition system put out more of a signal at higher rpm's, it went to ground. Shut off the engine immediately. It would restart immediately, but not run much over idle before it would do it again. Disconnecting the tach solved the problem. Buying a new tach corrected the problem. Might be worth taking the wire off the tach to check.<br /><br />Charles

 

[karayj]

Re: wire crossed on altanator/causing engine kill at 2500 rpms?

i will check the tach but i put a used motor in and that's when it started i purchased a distributor so i will have a new cap rotor wire sensor and will see what happens but on the other hand the battery was draining do it dould be a short also my carb has no elecric anything going to it

 

[karayj]

Re: wire crossed on altanator/causing engine kill at 2500 rpms?

well it was not the tach not vapor lock i open the fuel fill and i took the neg wire off the coil still stall after half throttle after 4 seconds

 

[karayj]

Re: wire crossed on altanator/causing engine kill at 2500 rpms?

does any one think it could be my thunderbolt IV ignition failing at highier outputs or it would not work at all

 

[karayj]

Re: wire crossed on altanator/causing engine kill at 2500 rpms?

Its Over I bought a used distributor on ebay giving me a cap rotor sensor wires and a coil all for 70.00 the boat runs great !!!!full power!!!!!!!!!!!!!!