what ignition system

wryork25

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Can someone help me with what ignition system I have based on my serial number, OF765981?

Part 2, is the Delco EST a good alternative? I am pretty sure my module is bad.
 

Bondo

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Can someone help me with what ignition system I have based on my serial number, OF765981?

Part 2, is the Delco EST a good alternative? I am pretty sure my module is bad.
Ayuh,..... Welcome Aboard,..... Yes, the Delco EST is a rock solid system,.....
 

Scott06

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Apr 20, 2014
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Can someone help me with what ignition system I have based on my serial number, OF765981?

Part 2, is the Delco EST a good alternative? I am pretty sure my module is bad.
Hers a parts breakdown for your engine https://www.marineengine.com/parts/mercury_marine_parts/sn/OF765981


your original set up would have been a mercruiser thunderbolt V . This is a good system unless the ignition module die$… the delco est is a great system, OEM quality.will bolt in with minimal rewiring
 

wryork25

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OK everyone, I am still trying to figure out this spark issue. per procedure about mid way down it states to disconnect the coil wire from top of the dizzy and connect a spark gap tester. then disconnect the white green wire from the dizzy and tap on ground. Look for spark at gap tester.

I dont have a gap tester, can I just use a spark plug with ground on the threads?
 

Bondo

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OK everyone, I am still trying to figure out this spark issue. per procedure about mid way down it states to disconnect the coil wire from top of the dizzy and connect a spark gap tester. then disconnect the white green wire from the dizzy and tap on ground. Look for spark at gap tester.

I dont have a gap tester, can I just use a spark plug with ground on the threads?
Ayuh,.... That should work,....
 

wryork25

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Jul 3, 2024
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Does anyone have any recommendations on where to buy a Delco EST if my module is bad? I am not sure if this violates rule 8? I am just looking for a reputable source.
 
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Bondo

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Ayuh,..... The place you see in the rule 8 violation thread is a quality supplier,....
Btw, the violation was for asking posters if They had one to sell, as it appears to be a Nla part, not asking where to find one,....
Btw 2, the forum rules are posted at the top of the main forum,..... ;)
 
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