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View Full Version : Help....Distributor problems


87MC Dave
07-16-2005, 11:13 AM
I am in the process of changing the distributor cap on my 87 PS190. Some how I have gotten the plug wires in the wrong sequence. Does anyone know the layout of the Prestolite 86 model distributor???

6ballsisall
07-16-2005, 11:16 AM
Do you mean the firing order or the direction the firing order goes in?

Firing order on the 351W is 1,3,7,2,6,5,4,8 and that order should be counter clockwise on your cap.

87MC Dave
07-16-2005, 11:20 AM
which connector is the #1 on the cap?

6ballsisall
07-16-2005, 11:29 AM
#1 should be when the rotor meets up and points toward the #1 cylinder (driver's side front) #1 on the cap is irrelevant, it can be wherever you want it to be as long as the cap clips down and lines up. You can always pull the #1 plug and turn over the motor with your finger in the plug hole and rotate until you feel compressed air coming out. That's TDC. Your rotor should be pointed at #1 then.

87MC Dave
07-16-2005, 11:33 AM
Thanks for all your help...... I'll try it out

Brn85ss
07-16-2005, 11:33 AM
Looking at the dis.from the bow it should be the plug in the 11:00 o-clock position on the cap.Postion the #1 cylinder to see if it's at tdc,then check your rotor location.

Sorry I type to slow Jeff got all the info for you.

Brn85ss
07-16-2005, 11:51 AM
Don't even look at my post Jeff is right about the #1 wire.I've gotten so used to my boat I had alittle brain fart.

87MC Dave
07-16-2005, 12:41 PM
Well as it turns out they were in the correct place....it was the primary spark advance spring. I just changed it over to electronic and my 87 actually used an 86 conversion kit. The only differance was the secondary spark advance spring. Vince at skidim was kind enough to send me a set of springs. The secondary was right but the primary was just a bit long causing my spark advance to be off. I backtracked what I did and put the spring I had in it that was worrking back in, and she hit first time I turned it over.....Thanks to all of you who helped me figure out the wiring it is appreciated...