Reply To: 7.5hp Merc Blue band thunderbolt ignition

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July 25, 2023 at 8:18 am #278475
CHUCK
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    I think that from looking at your picture you have one of the newer versions of Thunderbolt with a switchbox,  They are better than the earlier Phasemaker versions.  Still….if yours needs ignition repair….the components are rather pricey.

    Other issues common with all the smaller Mercs of that vintage are lower unit seal issues . 

    Very nice running engines however.