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Old 07-12-2018, 09:54 AM   #12
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Join Date: May 2010
Location: Solihull, England.
Posts: 7,557
Default Re: 39 Merc hesitating under load...driving me crazy

Re the secondary ignition. It's hard to test without replacing parts. You can help keep the loads down on the secondary side by using solid core wires, non resistive caps and keeping the plug gaps down at .025" i would pull the distributor and closely inspect the rotor and shaft. Unfortunately you have to dismantle it to do that. Do you have any other flatty powered cars that have a good distributor you could swap on - purely as a test to either rule it in or rule it out?
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