Trim positioning...Huh?

[perrosuperior]

Okay, I am new to the I/O sterndrive motors, and I believe I understand the mechanics behind using the trim to raise and lower the sterndrive, but I'm starting to second guess myself. So, can anyone point me to a guide to correct trimming of a boat for the different types of use? How about some tips / tricks? My old OB was pretty simple, it was a manual adjustment, so I didn't do much to it when I got it set for quick planing, and I think the idea of being able to move it has me over thinking it.

Thanks!

 

[smokeonthewater]

Re: Trim positioning...Huh?

well since you are over thinking I will over simplify...... Trim it so that it runs how you like it.... that is the correct trim....


Trim down for holeshot and trim up for speed..... trim down to stop porposing and trim up for more speed..... If you are trimming up and the engine starts to rev up trim back down a little.... You can play with it constantly to milk every ounce of speed or you can find a happy medium and run it...... You can adjust it every time you start and stop or you can set it once and boat all day..... do what works for you

 

[perrosuperior]

Re: Trim positioning...Huh?

Okay, so trimming all the way down isn't the best for speed? I didn't realize that, so maybe I was somewhat oversimplifying it. I'll have to play. Are there any up/down points that should pose concern while searching for the sweet spot?

Thanks!

 

[bruceb58]

Re: Trim positioning...Huh?

I have a fuel flow meter on my boat so if the water is calm and I am traveling a great distance, I trim for fuel economy. There is definitely a a sweet spot trimming fairly far out. I also found surprisingly, that my best fuel economy is at a lot higher RPM that I would think instinctively. Everyones engine and boat is different however.

 

[woosterken]

Re: Trim positioning...Huh?

per,
here you go , have a look at this article................

http://www.clubmarine.com.au/internet/clubmarine.nsf/docs/MG19-2+Technical

woosterken