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View Full Version : Johnson OB mods?



T-56
07-07-2006, 01:53 AM
I have a 2000 model 90. On the older V4's I understand that the different HP ratings were created w/ compression ratios and carbs. Is it true w/ the newer OB's and if so, how much HP can be derrived from a low hour 90?
EDIT: I can't just buy a larger engine since any extra wieght would most likely sink the boat that the 90 is on. I just want to find out how much is still left in the engine or should I go find an older 140.
http://i49.photobucket.com/albums/f283/T-56/CopyofBeaman2.jpg