8hp 1989 Johnson how fast?

How fast do you think an 8hp Johnson 2 stroke would push a 1436 Crestliner flat bottom Jon? I have a 1232 Jon now but am thinking of picking up the 1436 for the extra room. I don't want to get a new motor and if this one would push it ok I will do it. Thanks for the info.

I'm looking at the same motor for my 1236 semi-V. I'm curious to know that answer as well..

Difficult to say. Every boat and load is different.

But if it gets on plane, I'd estimate somewhere in the 10-15 mph range.

If it doesn't plane, somewhere around 8 mph.

My 8 HP johnson gets my 12' springbok with only me in it on plane and I'd guess around 14-15 mph. Put a second 200lb guy in it and we're plowing water.

My 12 is a little heavier than a bare hull though:



When it was a bare hull and only me in it it would jump on plane immediately. Now it takes a little bit longer, but it will plane.

I'd say pick up the bigger boat if you want it and try the 8 HP. If it doesn't do what you want, just find a 9.9-15 HP johnson and sell the 8 HP to help finance the bigger outboard.

You can also do the same if you add more weight to the 14 later on and it gets too heavy for the 8 HP to push it to the speeds you want.