Help,, trimming a 38 fountain ??
 

A friend of mine has a 38 SC Fountain .Small blown 510's with bravos and 4 blade bravo 1 props . He didn't gain much speed at all after upgrading from 502's. I know he has to be trimming it wrong . I am very familiar with trimming boats for high speed but I haven't driven his yet . I plan to this weekend .

He says it has a sweet spot at about 6 on the drive indicators with the tabs flat . Thats how he always runs it . I know it needs more .

MY question is ,Where is "6"? And where do you run big fountains at 70+ mph ? Of course I will have the answer on my own by Sunday ,MY SECOND TIME ON THE WATER THIS YEAR !! :( THANKS ,JOE

The best way to trim a Fountian is to cut the beek off:D Another would be to cut the beek and the swim platform off. I say trim it until it blows out and bring it back. 502 to 510 would not make a huge difference I would think.

If I remember an old post of boot's, this Fountain may have actually had it's beak cut off. Well, actually, cut in half.
Is this that same boat?

Rainmn, :D Your right , should have left that dam beek in the water instead of crazy glueing it back on !:D

Mitch , I know how to trim , I just wondered what numbers the beak guys run at what speed !:D

Thanks !

Joe said blown 510's.

How much speed increase is he seeing now? how much did he expect?

Oh yea.....quit helping other people and get you cat running so you can give me that ride you owe me :D

Oh, I know you know what your doing, I was just razzing ya. I would say change the X, does it have boxes? I had a 33 Donzi and I would be maxed out at 7.

on my 42 it likes to run stretched way out 6-6 1/2 not sure about a sport cruiser may not be able to carry the boat
later

Hi-perf, Don't worry , I WILL get you that ride and more ! Things are getting streched pretty far right now time wise ! House ,motor home, boatS ...... I have to finish the house and motor home before the winter . Boat will be ready the first warm day in spring ! :rolleyes:

Fountain HAD 502's , with 23 mirage ,ran high 60's.
Now has 510's with merlin heads , 250 blowers etc., and and runs around 70 with 4 blade bravo 24's .........

Something is lacking ..........

WHAT YEAR IS IT, WHAT GEAR RATIO, I HAVE A 35FOUNTAIN AND IT FREES UP AT SIX BUT GETS FREEER AT 8

He did say 38SC. Those sport cruisers weight as much as a small house. And the have all the same amenities. :D