Ignition install | 356 Speedster, 550 Spyder, Replica, Automotive Community

Former Member

I purchased a new Bosch ignition to replace the one that is made for a lawnmower on my speedster. The unit has 5 screw terminals with corresponding numbers that read as follows: 50, 75, 15, 30, and 30.
The existing switch has 4 terminals on back, 5 wires (two wires run to a single terminal) that read as follows: BAT, ACC, IGN, ST
I can pretty much figure out what all that means. Question is what goes to what when I switch over to the new ignition?

8/16/104:13 PM

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Former Member

I purchased a new Bosch ignition to replace the one that is made for a lawnmower on my speedster. The unit has 5 screw terminals with corresponding numbers that read as follows: 50, 75, 15, 30, and 30.
The existing switch has 4 terminals on back, 5 wires (two wires run to a single terminal) that read as follows: BAT, ACC, IGN, ST
I can pretty much figure out what all that means. Question is what goes to what when I switch over to the new ignition?

Former Member

50 = Starter control.
75 = Acc, (Radio, Cig. Lighter).
15 = Ignition.
30 = Battery.

For more details see:
http://vintagebus.com/wiring/defs.html

Former Member

Cheers Larry.

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