coil

ddependo
Royal Aluminum Star
Posts: 261
Joined: Mon Jul 14, 2014 10:00 am

coil

Postby ddependo » Tue Jul 30, 2019 9:15 am

Last weekend running down the river at 2500 rpm and starboard motor started loosing rpm and sputtering. To make a long story short found that coil was jumping fire from negative to positive terminal. Now that is scary to have a spark jumping that 2.5 inches in the bilge. Not jumping from coil tower but from screw terminals. I have been running automotive coil because I didn't think there was a difference between a marine & automotive. This is not a high output coil.
What say you gear heads?
Wayne
1973 32 express fly bridge
Chattanooga
"Southern Lady"

Fastjeff
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Re: coil

Postby Fastjeff » Tue Jul 30, 2019 10:11 am

Yikes! Shorted out internally somehow. Slap another coil on there and you'll be fine.

Jeff
"We live at the bottom of an ocean of air, not at the top." General Marvage Slatington

ddependo
Royal Aluminum Star
Posts: 261
Joined: Mon Jul 14, 2014 10:00 am

Re: coil

Postby ddependo » Tue Jul 30, 2019 11:04 am

Thanks Jeff I did & runs fine, just wondering
1973 32 express fly bridge
Chattanooga
"Southern Lady"

Fastjeff
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Re: coil

Postby Fastjeff » Wed Jul 31, 2019 6:40 am

Stuff happens. Even brand new parts fail, and often right away.

Jeff
"We live at the bottom of an ocean of air, not at the top." General Marvage Slatington

Wardog
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Re: coil

Postby Wardog » Thu Aug 01, 2019 7:52 pm

I basically have the same issue..i cant get starboard motor to exceed 2500 rpms..um having my mechanics look at it again..the motor shuts down..sometimes back fire..iv had carb rebuilt..a new electric fuel pump installed new plugs..and new resistor..coil is my last option. Motor has had timing reset 2 times now..anymore advice..

Wardog
1968 32 ft Marinette
318/225hp
ALKINDA

Fastjeff
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Re: coil

Postby Fastjeff » Fri Aug 02, 2019 7:14 am

Look for crossed plug wires. Seriously. The way the wires dive below the manifold encourages this nonsense!

Try this: With the motor warm and idling, pull each wire, one at a time, from the distributor cap and see how the motor reacts, then stuff it back in. If you notice two wires are not doing anything, switch them and see what happens.

Jeff

PS: You'd be surprised how well a Mopar V-8 will idle on 6 cylinders in a boat; mine planned off easily that way as well,
"We live at the bottom of an ocean of air, not at the top." General Marvage Slatington

Wardog
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Re: coil

Postby Wardog » Fri Aug 02, 2019 11:12 am

Ok..thanks il do that. Just got a call today that my starboard carb is gunk up again with crap in it..mechanics think it was debree. From old fuel pump replaced last month. I had a new electric fuel pump put on that motor..so basically overhaul carb again flush out fuel lines..port engine runs off of same 150gl tank with no issues...like to meet up some time..im at goosepond marina...thanks

Wardog
1968 32ft Marinette
318 motors
Alkinda

Fastjeff
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Re: coil

Postby Fastjeff » Fri Aug 02, 2019 4:22 pm

Where's Goosepond Marina?

Jeff
"We live at the bottom of an ocean of air, not at the top." General Marvage Slatington

Wardog
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Re: coil

Postby Wardog » Fri Aug 02, 2019 9:17 pm

Scottsboro Ala. I plan to cruise up to Chattanooga in the fall. For first short trip. I might be 4 hrs or 5. By boat...

Fastjeff
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Re: coil

Postby Fastjeff » Sat Aug 03, 2019 6:28 am

Sounds nice.

Jeff
"We live at the bottom of an ocean of air, not at the top." General Marvage Slatington