how can i make my boat go faster????

[CAPTAL]

I have a 165hp 3.7l mercruiser. It idles fine at 700rpm. But at WOT it reaches 3500rpm. can i make it go faster? what is the max rpm's i can go?

 

[Jacques321]

Re: how can i make my boat go faster????

Get yourself a lower pitched prop. Your mercruiser's maximum rpm is probably around 4500/4600. So if you're stuck at 3500 rpm all the time that is not good for your engine in the long run. Every inch of pitch you lower should get you an extra 150-200 rmp's.<br />For example if your current prop is a 26 in. pitch, get a prop pitched at 20 or 21 inches. This will make your engine rev at or near max rpm's and should get you more speed..I hope.

 

[Diesel]

Re: how can i make my boat go faster????

You might want to try trimming your boat at WOT. Mine will change as much as 500 rpm with a variance of up to 4 degrees of trim.

 

[12Footer]

Re: how can i make my boat go faster????

Yes to both, but first, have someone you trust operate the boat,while you inspect the linkage to the throttle plate,to make sure it opens fully.<br /><br />Next, see if your tach will show you full RPM in nuetral.<br /><br />Every boat can benifit from trim tabs.<br />The only question is whether it will benefit enough to pay for them. Luckily, this is 9 times outta 10.