20HP Johnson – Help Identifying without Tags

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September 28, 2025 at 11:09 am #300216
Marcel Kahn
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US Member
Hi All,
Trying to help a friend identify a motor model and year without tags. He has a 20hp Johnson with a flywheel PN 580231D2. Hoping to help narrow down possible models between 1967 through 72. Thank you in advance for any help.
September 28, 2025 at 11:19 am #300217
fleetwin
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US Member
Post some pictures, perhaps we can help by seeing the paint, and engine cover
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