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Unread 06-12-2019, 11:24 AM   #41
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Join Date: May 2017
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Default Re: 295 robin pulsar coil question

Since the ignition module cannot be tested, I was looking for another way other than the HEI unit. I could not get a HEI unit to work for me. Since in reality all the ignition unit does is ground the coil at the signal from the impulse coil, I figured replacing it should not be a big deal. Well, for someone that knows what they are doing (not me, I can read a schematic and build from it, I have a very basic understanding of electronics and cannot design any but the most basic circuitry). So an engineer on an electronics forum designed one for me.
What about all the poor Gomers (like me) that test their coils and get ~20 ohms and decide it is bad based on the values given in the factory manuals? A painful lesson to learn.
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Unread 06-12-2019, 12:15 PM   #42
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Default Re: 295 robin pulsar coil question

I checked the coil I removed from my engine and it read 380 ohms. I wiggled the wires and no 'open' occurred. I applied the hot air gun and the ohm reading increased in a linear fashion, no 'opens'. As the resistance increased I assume the voltage will likewise increase. I am going to re-install it and see what happens.
I hate this ignition system.
As I previously noted, this impulse coil came from a Yamaha 70 hp outboard. I did have to open the mounting holes to make it fit.
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Unread 06-12-2019, 10:11 PM   #43
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Default Re: 295 robin pulsar coil question

Quote:
Originally Posted by wendy View Post
I checked the coil I removed from my engine and it read 380 ohms. I wiggled the wires and no 'open' occurred. I applied the hot air gun and the ohm reading increased in a linear fashion, no 'opens'. As the resistance increased I assume the voltage will likewise increase. I am going to re-install it and see what happens.
I hate this ignition system.
As I previously noted, this impulse coil came from a Yamaha 70 hp outboard. I did have to open the mounting holes to make it fit.
I can make em fire. Great ignition system in my opinion.
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Unread 06-13-2019, 07:11 AM   #44
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Default Re: 295 robin pulsar coil question

I am jealous. In all honesty, this system worked well for years. I am just missing something obvious.
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Unread Yesterday, 05:28 AM   #45
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Default Re: 295 robin pulsar coil question

If you take those of us who have worked on these carts advice then there is no reason you can't make this thing fire. Heck, I just made it out of HS 54 years ago and I can do it so you can also.
Good luck. Stay with it.
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Unread Yesterday, 08:03 PM   #46
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Default Re: 295 robin pulsar coil question

Please help! I have followed all the advice provided by you kind folks to the best of my ability. I have separately grounded everything in sight. I have replaced all the components. The ones I can test check out. I can drag the ground wire to the ignition coil across a grounded surface while the engine is cranking and the spark tester lights This is an in-line tester; neon light maybe? The impulse coil measures .56 volt at the ignition connections at the ignition module. I have replaced all the wiring in the ignition system with 14 gauge wire, carefully marking both ends to match the igniter module (white/black tape, white/red tape, etc.) I have checked the continuity of all the wires. I have installed a relay operated by the 18 gauge wire coming from the ignition switch. It powers a bus bar that provides power to all the various components. A few years ago, after three vacuum pumps failed, I installed an electric pump and was afraid the little 18 gauge blue wire couldn't handle the increased load. It has been this way for a while, long before this debacle.
Please, pray tell me what I am doing wrong. Dynamite does come to mind.
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