89 70 hp johnsn prop size

[denny]

what year did johnson go to the larger lower ends on the 70hp. I am currently running a 15 pitch prop and am wondering if I should go to a 17 pitch with thelarger dia. A past article in trailer boats magazine ran tests<br />with different17 pitch props but cautioned to make sure you have the newer trim tab so the prop will clear. info not on me but believe I am running a 13 1/4" dia now.I belive they did their tests with a 14" dia. <br />Also, exactly what is it wd-40 does, will it start your engine? combustable?

 

[petryshyn]

Re: 89 70 hp johnsn prop size

Hello<br />WD-40 is combustable. Its also a lubricant. Thats why it makes a good starting fluid for dry 2-strokes. It also displaces moisture which can be helpfull if condensation is riddling you plug electrodes.......Its also very toxic!!! Inhalation danger!!!<br /><br />

 

[ralph]

Re: 89 70 hp johnsn prop size

I have a 55 hp Johnson Commercial with the same lower unit as your 70 hp. The motor came with a factory 17 inch SS prop which is too much for my 55 hp. I need a 13 or 15 pitch. There are many Johnson 55 and 70 hp in our little fishing town so I'm pretty sure about the numbers. What kind of boat are you pushing?null