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Damaged ignition by 'cranking over'? ...

Discussion Forum at MarineEngine.com » Mercruiser Sterndrive » Damaged ignition by 'cranking over'? thunderbolt 1v « Previous Next »

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mikeday
Member
Username: english_man_in_norway

Post Number: 9
Registered: 10-2009
Posted on Tuesday, October 13, 2009 - 02:06 pm:   Edit Post Delete Post View Post/Check IP

I was cranking over the engine with the ht lead disconected from the distributor,but due to my 'inexperience' didn't disconect the appropriate wires & noticed 'sparking' coming from the coil terminals,when I tried to start up again I couldn't get a spark from a sparkplug whilst connected to the coil ht lead & grounded,have I damaged the coil or the ignition amplifyer?
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makomark
Senior Member
Username: makomark

Post Number: 1656
Registered: 09-2008
Posted on Tuesday, October 13, 2009 - 02:38 pm:   Edit Post Delete Post View Post/Check IP

Possible. Suggest going thru the TB-IV troubleshooting flowchart. If you need a copy, just ask.
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mikeday
Member
Username: english_man_in_norway

Post Number: 10
Registered: 10-2009
Posted on Tuesday, October 13, 2009 - 03:43 pm:   Edit Post Delete Post View Post/Check IP

yeh thanks that would be useful,I used a Voltmeter & got battery power from the coil & the ignition amplifyer,I have also just fitted a new ignition distributor sensor,so that should rule that out.The enoying thing is I only need to get her running for 10 minutes,to get her to the ramp,as im going to winterise her & fit new head gaskets.
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makomark
Senior Member
Username: makomark

Post Number: 1657
Registered: 09-2008
Posted on Tuesday, October 13, 2009 - 04:21 pm:   Edit Post Delete Post View Post/Check IP

at least it still spins over...

application/pdftbtrouble
thunderBolt-IV Troubleshooting-small.pdf (35.3 k)
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mikeday
Member
Username: english_man_in_norway

Post Number: 11
Registered: 10-2009
Posted on Tuesday, October 13, 2009 - 04:34 pm:   Edit Post Delete Post View Post/Check IP

yeh little consulation I suppose,I'l try that sequence tommorow,cheers.

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