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Discussion Starter · #1 ·
Need some help with how many MPG/GPM? My buddy just bought a 89 18ft Wellcraft CC w/ same yr Johnson Seahorse 140. I think one of our first trips is going to be on the BIG lake and I wanna make sure we have enough petro.

Thanks
 

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POC chunker
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I'm pretty sure the 140s of that era were loopcharged motors, and they are thirsty beasts. Expect about 2-2.5 mpg. And don't trust the fuel gauge on a boat you've just bought and have no previous experience with.
 

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Discussion Starter · #4 ·
I was thinking at least 2 mpg so now I know how much extra gas he needs.

Thanks
 
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