outboard height on my 18

hugo · #1 02-08-2013, 03:06 PM

on any boat without a braket it needs to at least (the cav plate) level with the bottom of the boat. some like it higher. but never lower than that.

McGillicuddy · #2 02-08-2013, 03:45 PM

Yes, your motor is too low. Hopefully you have at least 3 holes to raise it. 1-1/2" is perfect on my 20' w/ a 300 lb Merc 115.

Highly recommend a 15p Black Max/Black Diamond alum prop, or a PowerTech MQF3, also 15p, if you go stainless. Great lift and maximum all around performance for said power and boat.

Beaver · #3 02-08-2013, 04:36 PM

Excellent. I have three holes left on the engine. Thanks for the feedback.

McGillicuddy · #4 02-08-2013, 11:50 PM

If your Tohatsu has the 2.33 gear ratio, you may be able to swing more prop. What year is your motor and what prop are you using currently?

Good luck. and keep us posted on your change in performance.

Beaver · #5 02-19-2013, 07:21 PM

Sorry for the late reply. The motor is a 91 90A. WOT seems to be about 5400 and the motor seems to get it up on plane pretty quickly but I have noticed a little porpoising and splash back on the transom which got me thinking about the height. Im checking with buddies to see if anyone has a motor puller I can borrow. Ill let you know the results.