Bad coil or ignition wire?

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   I have a 93sncb with a 351. After the boat runs for about 5 miners or so, the boat shuts off. Sometimes it will start back up sometimes not. 

We ran a wire to the positive side of the battery and then to the hot side of the coil. It seams to help, but the problem still happens. 

Last summer I hade replaced amongst everything plugs points, wires, fuel filter, but the coil I put on 2 years ago is an automotive MSD coil it worked fine for a year. 

I am out of ideas and I have several upset teenagers that want to go skiing.   please help. 

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W.U.S.S. Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: February-12-2009 Location: Hamilton, IN Status: Offline Points: 78	Post Options Post Reply Quote W.U.S.S. Report Post Thanks(0) Quote Reply Topic: Bad coil or ignition wire? Posted: May-24-2014 at 12:13am
	I have a 93sncb with a 351. After the boat runs for about 5 miners or so, the boat shuts off. Sometimes it will start back up sometimes not. We ran a wire to the positive side of the battery and then to the hot side of the coil. It seams to help, but the problem still happens. Last summer I hade replaced amongst everything plugs points, wires, fuel filter, but the coil I put on 2 years ago is an automotive MSD coil it worked fine for a year. I am out of ideas and I have several upset teenagers that want to go skiing. please help.

IAughtNaut Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: August-22-2010 Location: TN Status: Offline Points: 2568	Post Options Post Reply Quote IAughtNaut Report Post Thanks(0) Quote Reply Posted: May-24-2014 at 1:45am
	when it shuts off is the coil hot? not a little warm, too hot to keep your hand on...also, have you checked the voltage from the ignition and into the coil? what does the inside of the distributor look like? corrosion? moisture?
	bring the ruckus 2000 Pro Air

CrazyCanuck Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: July-21-2013 Location: Vancouver B.C. Status: Offline Points: 254	Post Options Post Reply Quote CrazyCanuck Report Post Thanks(0) Quote Reply Posted: May-24-2014 at 3:32am
	Forgive me for asking the dumb question, but are you sure its spark, and not fuel?
	https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcRtW3vJrMHLdqBzndt9VX3oOpBuRopGlzKq9Ea7pAO7wnTuoD8E8g

W.U.S.S. Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: February-12-2009 Location: Hamilton, IN Status: Offline Points: 78	Post Options Post Reply Quote W.U.S.S. Report Post Thanks(0) Quote Reply Posted: May-24-2014 at 9:46am
	The coil is warm but not too hot, I was just concerned that it is a automotive coil and it is laying down. I'm leaning towards either the coil or the wire supplying it. I have replaced everything else, cap, rotor, plugs, wires 2 years ago. I suppose I could still have a cap/rotor problem. I will check that tomorrow. What should the voltage be coming out of the coil?

W.U.S.S. Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: February-12-2009 Location: Hamilton, IN Status: Offline Points: 78	Post Options Post Reply Quote W.U.S.S. Report Post Thanks(0) Quote Reply Posted: May-24-2014 at 9:49am
	I'm not really sure of everything. Lol I have changed the fuel filter about 4 years ago. I'm pretty picky about what kind if fuel I put in in. Only ethanol free, never pump gas. But that is another item I will check tomorrow. Thanks.

Bri892001 Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: September-27-2008 Location: Boston MA Status: Offline Points: 4947	Post Options Post Reply Quote Bri892001 Report Post Thanks(0) Quote Reply Posted: May-24-2014 at 11:52am
	Wait, if you have a positive wire going directly from your batter + to your coil +, how does it ever shut off? Sounds like you've circumvented your ignition switch. You probably need a different coil as well. Talk to Zach at N3 or Vince at Skidim about getting you the right coil. This is a handy tool to see if you're getting spark. You can leave it connected for a while. When the boat is acting up, see if you're still getting spark. http://buy1.snapon.com/catalog/item.asp?P65=&tool=all&item_ID=641969&group_ID=675520&store=snapon-store&dir=catalog Also, give us some pics of your dizzy (distributor), coil, ballast resister and wiring to them.

W.U.S.S. Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: February-12-2009 Location: Hamilton, IN Status: Offline Points: 78	Post Options Post Reply Quote W.U.S.S. Report Post Thanks(0) Quote Reply Posted: May-24-2014 at 4:17pm
	We just ran a wire to the coil to try to eliminate an issue with the ignition.

SNobsessed Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: October-21-2007 Location: IA Status: Offline Points: 7102	Post Options Post Reply Quote SNobsessed Report Post Thanks(0) Quote Reply Posted: May-24-2014 at 11:53pm
	You might also take the flame arrestor off (when it is in-op)& see if the accel pump can squirt gas. If not, pour a little (very little) gas down the carb, put the FA back on & see if it starts. You could have a restricted anti siphon valve or a clogged vent. So your '93 has points? Did you retro an old dizzy in place of the protec? Another long shot could be a bad condenser.
	“Beer is proof that God loves us and wants us to be happy.” Ben Franklin

Bad coil or ignition wire?

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