What diffrence betwen......?

[andreas73]

Hello.<br />I have a Johnson 40hp -88 whit VRO, my problem is that I need more Hp and I don´t have alot money.<br />Is it possible to make a 40hp to a 50hp. <br /><br />

 

[clanton]

Re: What diffrence betwen......?

May be just carbs and reed block. The engine block,exhaust housing, and ignition system the same. Most of the time I don,t reply to these post, but thought I would look at parts book. Timming, link,and sycn may be different.

 

[Dhadley]

Re: What diffrence betwen......?

We go through this all the time. The main difference is the reed stops. They are very closed on the 40 compared to a 50 or 2 cylinder 60. You can open the stops or install Boyesen reeds, HOWEVER, experience shows us that if you are only turning 5000-5500 now you may not see any gain. You would have to be running on a very light boat with a good hull design to see much of a change. Remember, you are still using the same gear ratio, bore and stroke. <br /><br />Its an easy change - personaly I would do the Boyesen thing and work on the set up.<br /><br />Let us know how you make out! Good luck!