double ram or single?

[klem]

What will trim your motor faster the double ram or single ram on a merc 2.5.

[Liqui-Fly]

Not sure what a double ram is but two cylinders means your sharing the pump capacity so it will be slower unless the combined volume of the two is half the size of the single ect ect. It's all about volume.

[blkmtrfan]

If by double ram you are refering to the standard fishing motor trim system with the pump on the bracket and two little trim rams and one tilt ram compared to the merc heavy duty single ram with trim pump in boat then the answer to your question is the "double ram" system is faster but the '"single ram" is the heavy duty unit, hope that helps

[skywagon]

If you are talking about current production 225X's and 2.5L 280's, the twin ram is faster. The twin, internal trim pump assembly on the 225X is much faster than my 280 single, external trim pump assembly. It was the same for my 260 offshore. I have checked both my old 260 offshore external trim and 280 sport mid external trim and they pale in comparison to my buddy's new 225X twin ram set up. The single ram is fairly slow...I often "run out of trim" during a blast from a dead stop to top speed. I have to linger at about 70 MPH until my trim catches up.

This is why you see so many drag racers run a mercruiser trim pump or 24Volt trim on their boats....they need the trim speed.

Hope this is what you were looking for.

Bill

[Raceman]

I've got 24 volts to the up side of the trim on my Yellow boat, and as a manual trim I feel it's unuseable because it's too fast. I've got it switched so I can go back and forth between 12 & 24, but leave it on 12. If you decide to experiment on 24V make sure you wire it right so you don't feed the other voltage to the engine by mistake. Merc electrical components are mega expen$ive and don't allow any margin for errors in wiring.

[Raceman]

Sky, I've never seen a Merc trim system that required lingering at a certain speed until the trim catches up. Sounds like there's a problem with that one unless they've made a change in the newer stuff.

[skywagon]

Raceman,

Actually I mis-spoke. My boat "lingers" around because trim is too slow.:) If I punch it at say 30 mph and dont have it slightly over trimmed then I will be waiting around with my nose down in the water once I hit 70. My 260 was the same way...same style trim and bracket. When accellerating from a relatively slow speed do you first put the trim where it needs to be? I don't have a trim gauge and I've always just had to "feel" where my trim should be at a given speed/condition. Let me know if I'm doing something wrong.

Thanks,
Bill