1968 55 hp Evinrude

[xlthompson]

I have seen where some have converted the ignition to an auto type but has anyone ever used a newer marine type ignition on this motor. Some of the newer ignition pacs are a lot cheaper than the OEM, for example the Mallory 9-25002 used on a 1983 model Johnson/Evinrude sells for around $55.00. Could any of these pacs be used to avoid the points "burn up" problem?

 

[Faztbullet]

Re: 1968 55 hp Evinrude

Sorry but it is two different ignition systems. Your engine has the battery CD ignition and engine models that use packs are alternator driven ignitions. Your system works like this(simple versions).
When you turn your key on you are supplying voltage (12v+) to the amp.The amp steps voltage up to around 200v and dumps it into coil. This dump is triggered by the points closing.

The alternator systems use a pack,stator and trigger base. When you turn key on you unground the pack. When flywheel is turning it creates voltage in stator which charges a capacitor in pack. The flywheel also sends a low voltage ac signal from timer base to pack, which dumps voltage into coil. This coil is wound so its output is near 10-14,000 volts.

 

[xlthompson]

Re: 1968 55 hp Evinrude

So what you are telling me this motor can not be converted if all of the newer ignition componets were used. I am sure you know the ignition system on the 1968 just sucks. I replaced the amp, run it for a couple of years and now have the same problem, spark comes and goes. I was hoping for a cheaper way to repair this motor that will last and be more reliable.

Thanks for thr reply

 

[Faztbullet]

Re: 1968 55 hp Evinrude

No cannot be used as: Stator boss's on block is not cast high enough, crankshaft taper is different, crankshaft stroke is different 2.34 vs 2.50(flywheel magnet wont trigger correctly). The system you have is a good system but sensitive. You need good wiring to points, good battery cables, and a type 24 starting battery not a deep cycle or dual purpose. Disconnect battery if left setting for extended periods and NEVER charge or boost battery with engine cables connected.