| Author |
Message |
    
loke
Member
Username: loke
Post Number: 24
Registered: 07-2006
| | Posted on Thursday, April 16, 2015 - 03:18 pm: | 
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Hi
Can someone help me with telling the difference between these two types of ignition systems (Bridgeport).
I have recently become the owner of a Bridgeport boat motor 4hp model 40 1cyl with the type ignition system that picture nr1 shows, though the vertical axis is missing, they were equipped with magneto ignition when they were sold to Sweden.
But the worm gear sits on the crankshaft and I intend to build such ignition system.
Thanks/Peter
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loke
Member
Username: loke
Post Number: 25
Registered: 07-2006
| | Posted on Friday, April 17, 2015 - 02:08 am: |
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Pictures of the flywheel side where the ignition shall be and the water pump on my 4hp  |
scott_n
Senior Member
Username: scott_n
Post Number: 242
Registered: 02-2008
| | Posted on Friday, April 17, 2015 - 10:39 am: |
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One is make and break and the other one at the top is jump spark |
miro
Senior Member
Username: miro
Post Number: 812
Registered: 11-2001
| | Posted on Friday, April 17, 2015 - 12:35 pm: |
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Your first picture has a timer. That means that , as Scott pointed out it is a "jump spark" ignition.
You will need a battery and a high voltage buzz coil.
There is a good discussion of the modern version of the buzz coil here.
http://www.oldmarineengine.com/discus/messages/3457/3079.html
and here
http://www.oldmarineengine.com/discus/messages/3457/267648.html
The modern version is much much better than a Model T Ford coil.
If you need the diagram, I can send it to you.
Miro |
loke
Member
Username: loke
Post Number: 26
Registered: 07-2006
| | Posted on Friday, April 17, 2015 - 03:07 pm: |
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Hi!
Perfect!
Thanks scott n, miro I think I have taken at least the electrical diagram and I build together a stuff now.
Will return!
Thanks / Peter |
loke
Member
Username: loke
Post Number: 27
Registered: 07-2006
| | Posted on Saturday, April 18, 2015 - 11:40 am: |
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now my "ignition box" ready and delivers a nice spark, I used an old magneto breaker points to check the function, thanks again for the tips.
Now on to the next problem to arrange, worm gear, power distribution, etc. |
loke
Member
Username: loke
Post Number: 28
Registered: 07-2006
| | Posted on Wednesday, May 27, 2015 - 08:03 am: |
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the Little helical gear is missing and my intention is to rebuild original ignition system, igot stuck in how many teeth, diameter, pitch...has that Little gear.Big one (Picture) sit on crank has 13teeth.
I would be happy if some one could tell the specifications on Little gear, i suppose Bridgeport use the same gears on 2cyl?
thanks/Peter
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scott_n
Senior Member
Username: scott_n
Post Number: 244
Registered: 02-2008
| | Posted on Wednesday, May 27, 2015 - 12:19 pm: |
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the gear would be 1 to 1 the timer would have two contact points 180 different one for each cylnder |
loke
Member
Username: loke
Post Number: 29
Registered: 07-2006
| | Posted on Wednesday, May 27, 2015 - 03:19 pm: |
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Thanks for the replies scott_n, it is my 1-cyl sorry I was unclear |
