Power pack problem?

egbaby

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Jul 30, 2003
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I'm new to this forum so please overlook any obvious mistakes.<br />My question is: I have a 1978 115 HP Johnson and<br />in the process of a shop orinated tune up. The carbs have been serviced with new kits, new feul<br />pump, new gas line from built-in gas tank, new spark plugs. The shop mechanic now tells me that the timing cannot be done acurately because one cylinder is not firing and that this is caused<br />from the powerpack on that side of the motor. He<br />says the coil for the nonfiring cylinder tests out<br />OK and that the powerpack is only functioning at <br />50%. I was under the impression that if a power pack went bad that it would not have any function at all.<br />I would like to see some comments on this subject.<br /><br />egbaby
 

angus63

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May 20, 2002
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Re: Power pack problem?

Did he swap powerpacks to confirm this?
 

Joe Reeves

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Feb 24, 2002
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Re: Power pack problem?

EG..... Inside the powerpacks are electronic switches. It is possible to have one on those switches fail, affecting one cylinder only.<br /><br />You have two identical powerpacks, one on each bank. Switch the packs. If the problem follows the pack, the pack is faulty.
 

egbaby

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Jul 30, 2003
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Re: Power pack problem?

THANKS TO ALL REPLYS.<br />TO JOE, I DON'T KNOW IF HE SWITCHED THE PACKS FOR THIS TEST. I'LL ASK HIM AT NEXT CONVENIENT TIME.<br />THANKS AGAIN.<br /><br />EG
 
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