Replacing engine 77 140 to a 78 140 with 77 lower unit

outdoor _guy

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Mar 3, 2023
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I have a 77 Johnson 140 to that is going to need the engine bored and rebuilt. I don't want to spend the money to buy a new engine and had already spent a lot on the rest of the engine.

Can I buy a reman 78 140 and put the intake on it from the 77 to be able to hook up to the exhaust housing and lower unit of the 77? The 78 has a different throttle and shift linkage but takes the same gasket for the manifold and exhaust engine mating area.

Looking for a veteran of the industry that might be able to help out. Thanks in advance.
 
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