Logo
FULL SITE MENU

89 classic fifty problems

J

John-in-atl

Guest
"Motor started running poorly

"Motor started running poorly so i rebuilt carbs and replaced all fuel lines as well as rebuilding fuel pump. After reassembly she started easily and idled great. Put it in the water for test and could not get full speed. Checked for leaks but could not find any. While test running it the motor shut off at low speed and will not restart. Pulled the bottom plug and it looks like the rest of them, not clean. I pulled and tested plug two and three for spark but found none.I do not have a book but I have a page from a book about troubleshooting. Does my flywheel have bolt in magnets? If so CDI resistance is good but no volts. Also trigger resistance is 764 on purple to white test and 744 on brown to white test with no volts on any wire. I think it is the trigger can anyone confirm based on this information?

Thanks
John"
 
"DVA not volts.
============

"DVA not volts.
========================
Flywheel with Bolted-in Magnets:
Blue Engine GND 5800-7000 & 180V or more
Red Engine GND 135-165 & 25V or more
=======================================
Check the trigger resistance and DVA output as given below:
Brown wire White/Black 800-1400 4V or more Connected
White wire White/Black 800-1400 4V or more Connected
Purple wire White/Black 800-1400 4V or more Connected
Brown wire Engine GND Open 1V or more (*)
White wire Engine GND Open 1V or more (*)
Purple wire Engine GND Open 1V or more (*)
(*) This reading can be used to determine if a pack has a problem in the triggering circuit. For instance, if you have no fire on one cylinder and the DVA trigger reading for that cylinder is low – disconnect the trigger wire and recheck the DVA output to ground from the trigger wire. If the reading stays low – the trigger is bad.
.
3. Check the DVA output on the green wires from the switch box while connected to the ignition coils. Check the reading on the switch box terminal AND on the ignition coil terminal. You should have a reading of at least 150V or more at both terminals."
 
disconnecting the yellow and b

disconnecting the yellow and black wire resulted motor starting and running on 3 cylinders with the key not cutting it off. What part is bad?
 
"ign switch, mercury switch&#4

"ign switch, mercury switch(tilt switch), or wiring from motor to switch. To kill engine use the choke."
 
Thanks for the help everyone.

Thanks for the help everyone. Found out it was the tilt safety switch. That was the first thing I took out but I thought the circuit was complete until the motor was tilted so I attached the wire to the block and there was the problem. Figured it out after removing the black and yellow wire from the switchbox and now everything is working again.

Thanks again
John
 
Back
Top