Johnson "70mod"

[Powerabout]

whats the large hose looks like its going from top of the block to the old tell tail fitting?

[hupiveneilija]

whats the large hose looks like its going from top of the block to the old tell tail fitting?

Correct, its coming from old telltale fitting wich was largened and goes all the way through lower cowling. Ive made waterdump because that LWP on the nose is feeding so much water that wasnt able to get motor warm a bit.
Now with that and little adjusting on thermostat, have better control on temp.

-J-

[hupiveneilija]

What a day it was for boating!😎
Sunshine , little wind and 4*c temp. Todays result was what you see in the picture, have to find more pitch!

-J-

[hupiveneilija]

Done little tinkering with exhaust for next season!

[ferdthe4]

the last video of it running thing sounded awesome.

[Hans69]

So now it's next season.
I want to know more about this build, maybe someone else want that too......
What is the estimated Horsepower on this engine.
Can you guestimate, this boat with this weight at that speed needs so and so much horsepower.
Keep it up, -it's fun!

[hupiveneilija]

Sorry it took this long, but have been driving last setup this far! Now its time to change that new tuner in place. Will get back here with results.

-J-

[hupiveneilija]

Hi all!
Now i have been able ro try that new tuner. Everything else stayed same except that little amount of water wich have been flowing through the can is gone, so its dry!
Top speed before with my srx has been 58.6kn is now 59kn, driven quite warm weather! But the way it takes it is something DIFFERENT, 58 is just like that!!�� Last knot has to be trimmed.
And washmarks are on a rich side.
Drove last wknd 70km wot without any proplems, totally 140km and just under 50litres gasoline, not bad at all!��

-J-

Ps. Guessing the weight until now. 390kg fully loaded w/o drivers!

[hupiveneilija]

Next on todo list. These are 40mm diam so i must open carbs front a little.

[ferdthe4]

good update it's much appreciated. Any measurements on that exhaust tuner and exhaust housing just trying to have a comparison of the difference between stock and yours. Since my application I'm after more mid range power and sounds like the exhaust mods helped your low to mid acceleration from what you said.