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'73 OMC 9.5 Help (No Ignition After Repairs/Maintenance)
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<blockquote data-quote="Pappy" data-source="post: 399271" data-attributes="member: 3278"><p>Cracked coils can be arcing anywhere.....replace them. You may be able to look up testing outboard coils on a Mercotronic on YouTube somewhere to see what happens to cracked coils under load. Hint....don't hold your hand anywhere near a crack. </p><p>If the condensers are old.....replace them as well. </p><p>Cut your plug wires back and leave about 1/8" wire exposed when you shove them back into the coil pilots. Hopefully you will get OEM coils which come with new coil boots for the mag plate. </p><p>Secondly, the compression is marginal. See how it runs. It may never be a fast starting or great idling engine with that compression. Worse when hot. Know that going in. </p><p>Third, the only pressure a fuel system will hold is between the closed needle and seat and the check valve in the primer bulb. Do not expect the primer bulb to hold pressure when the engine is running.</p></blockquote><p></p>
[QUOTE="Pappy, post: 399271, member: 3278"] Cracked coils can be arcing anywhere.....replace them. You may be able to look up testing outboard coils on a Mercotronic on YouTube somewhere to see what happens to cracked coils under load. Hint....don't hold your hand anywhere near a crack. If the condensers are old.....replace them as well. Cut your plug wires back and leave about 1/8" wire exposed when you shove them back into the coil pilots. Hopefully you will get OEM coils which come with new coil boots for the mag plate. Secondly, the compression is marginal. See how it runs. It may never be a fast starting or great idling engine with that compression. Worse when hot. Know that going in. Third, the only pressure a fuel system will hold is between the closed needle and seat and the check valve in the primer bulb. Do not expect the primer bulb to hold pressure when the engine is running. [/QUOTE]
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'73 OMC 9.5 Help (No Ignition After Repairs/Maintenance)
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