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    1978 Evinrude 70HP- Trouble starting/idling/bogging under load

    I’ll order this.
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    1978 Evinrude 70HP- Trouble starting/idling/bogging under load

    What should I be looking for? Or what tool is actually going to be useful for this? I can test for spark but i guess I’m wondering how I test the gap it sparks. Do I just hold it 1/2” inch for metal and see if it jumps?
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    1978 Evinrude 70HP- Trouble starting/idling/bogging under load

    Picked up an inline spark tester and will test soon. What’s the name of this other device and I’ll order it along with new head gasket
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    1978 Evinrude 70HP- Trouble starting/idling/bogging under load

    3/8” spark? Like from plug to engine block? And if I pull the heads do I have to mess with timing? I’m down to rebuild if necessary
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    1978 Evinrude 70HP- Trouble starting/idling/bogging under load

    Should I be cleaning the exhaust housing? Or what is causing it to run so poorly in your opinion? I’ll buy a new engine down the road but I wanna use this one if possible
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    1978 Evinrude 70HP- Trouble starting/idling/bogging under load

    I have a feeling this is it. Would this explain the seepage on the lower end?
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    1978 Evinrude 70HP- Trouble starting/idling/bogging under load

    So just unburned carbon sludge? Or where is this material coming from?
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    1978 Evinrude 70HP- Trouble starting/idling/bogging under load

    Haven’t tested for spark but I will this evening when I have another set of eyes to turn the engine over for me
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    1978 Evinrude 70HP- Trouble starting/idling/bogging under load

    13-14v like a car battery? And maybe rings are worn?
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    1978 Evinrude 70HP- Trouble starting/idling/bogging under load

    Hi All, I recently purchased a 1982 starcraft that has a 1978 EEvinrude 70HP 3cy 2stroke engine. Its electric start with a steering console. Previous owner stated it bogged under acceleration and would die. I took it out for a leak test and can confirm this was the case. I got it opened up and...
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