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My late father-in-law left behind a 75hp Johnson (about 1990 model) that has a blown piston. He totally redid the lower unit (several hundred dollars just for parts) but never got around to replacing the piston before he died. Would it be worth the money to get it going? Has been laying down for about 2 years.
 

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if u know how then I would they are very tough motors if u have to pay someone to do it get another it would be 1500-2000 to have it done (re ring all other pistons ,bearings , piston ,bore , carbs done ,water pump and t-stats, gasket set )
 

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That is a fairly easy engine to build.
If this is a freshwater motor, it wont be too bad, if it is a salt water motor, and showing quite a bit of rust, get ready for a job!
The hardest part of the build is going to be removing all of the bolts that break off!
 

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I rebuilt a 70s model Johnson 50 horse which I assume is pretty similar. It was pretty straightforward using a shop manual. They are tough motors.
 
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