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#577197 - 20/05/19 02:06 AM Ign Coil Testing
AncientMariner Offline

Just Getting Started

Registered: 16/04/18
Posts: 26
Loc: Colorado, USA
I went for a fairly long putt around town to celebrate the new exhaust bobbins that will actually keep the portside pipe from bouncing off an dragging on the pavement. Nearly home, I stopped at a red light and noticed that things had gotten very quiet. She wouldn't start. Added a trickle of fuel, turned the key, I'd hear the expected fuel pump run-then-stop. Still no start so I called a tow truck. At home, checked coil primary and got no continuity. Thinking I just wasn't getting on the contacts down inside the connector shell, I tried the secondaries and got about 10K ohms on each one. That's about what I was expecting, from my Google research. That confirmed that I was able to touch the contacts with my meter leads. Tried the primaries again with the same result. I expected to see 3-5 ohms but read infinity. Installed new NGK plugs. I'm now shopping for a coil. I assume that the coll for Harleys is much the same?
_________________________
John, retired merchant seaman
12 M3W
12 MotoGuzzi Griso
10 MotoGuzzi V7 Classic
06 Suzuki Vstrom 650

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#577198 - 20/05/19 03:02 AM Re: Ign Coil Testing [Re: AncientMariner]
AncientMariner Offline

Just Getting Started

Registered: 16/04/18
Posts: 26
Loc: Colorado, USA
Any reason NOT to use a Harley p/n 31696-07A coil? USD 39.50 on Ebay.
_________________________
John, retired merchant seaman
12 M3W
12 MotoGuzzi Griso
10 MotoGuzzi V7 Classic
06 Suzuki Vstrom 650

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#577200 - 20/05/19 03:56 AM Re: Ign Coil Testing [Re: AncientMariner]
LightSpeed Offline
Talk Morgan Regular

Registered: 18/02/19
Posts: 603
Loc: Port Orchard Washington, USA
If I had to replace a coil I sure would use the Harley coil. Easy to obtain and you don't have to import something.
_________________________
M3W, "Make it so Number One", 2 more weeks, maybe...

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#578649 - 29/05/19 04:31 AM Re: Ign Coil Testing [Re: AncientMariner]
AncientMariner Offline

Just Getting Started

Registered: 16/04/18
Posts: 26
Loc: Colorado, USA
I was mistaken about reaching the contacts properly on the primary resistance test. With the coil removed and using a light and narrow tester probes, I got 3 ohms on the primaries. Coil is fine. The problem turned out to be a failed timing belt.
_________________________
John, retired merchant seaman
12 M3W
12 MotoGuzzi Griso
10 MotoGuzzi V7 Classic
06 Suzuki Vstrom 650

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