1992 Overnighter 20 GPH

[tjohnso4]

I recently purchased my first boat which is a 1992 Grady White Overnighter 20. I'm excited to take it out into the chesapeake bay this summer for cobia. It's currently in the shop for a tune up before I take it out. I have a 2 Stroke Johnson 150HP motor on it. Does anyone know what the range is on the fuel or GPH about average this would use? Thanks in advance!

 

[basspirate]

Older engines, the general rule of thumb is 1gph for every 10 hp at WOT. So your 150 will go through about 15gph @ wot. If you cruise at about 3500 rpms the gph is usually about half the WOT amount.

 

[tjohnso4]

Thank you, very useful information!