Doel-Fin?

Doel-Fin?

Post by Shau » Tue, 30 Jun 1998 04:00:00


Installation requires drilling four holes.  Hope it will have less
prop blow-out on hole shot, turning, and waves.

In looking at many used boats recently, the Doel-Fin seems to be the
one most installed.  Does anyone know why?  Noticed Doel-Fin less
expensive  and more available than "Sting Ray" and others.  What is
the best?

Desire fin to be out of the water when trimmed for high speed (less or
no drag).  Do some fins reach out of the water more than the Doel-Fin?

In case it matters installation will be on a '89 150 Evinrude Stratos
289 FS and a '97 250 Merc Stingray bowrider 200LS.

Thank you for your time,    - Shaun.

 
 
 

Doel-Fin?

Post by lance clause » Tue, 30 Jun 1998 04:00:00

Quote:

> Installation requires drilling four holes.  Hope it will have less
> prop blow-out on hole shot, turning, and waves.

> In looking at many used boats recently, the Doel-Fin seems to be the
> one most installed.  Does anyone know why?  Noticed Doel-Fin less
> expensive  and more available than "Sting Ray" and others.  What is
> the best?

> Desire fin to be out of the water when trimmed for high speed (less or
> no drag).  Do some fins reach out of the water more than the Doel-Fin?

> In case it matters installation will be on a '89 150 Evinrude Stratos
> 289 FS and a '97 250 Merc Stingray bowrider 200LS.

> Thank you for your time,    - Shaun.

I have rigged and run quite a few Javelins and Stratos models of your
type and motor combination.  If you are experiencing prop blow out in
turns and take off, that is somewhat normal. However, if the wrong prop
is used, trim angle set too high, or motor mounted too high on transom,
prop blowout can make the boat hard to operate. Personnaly, I have never
been in one of these that needed trim fins added. On takeoff you have to
give it quite a bit of throttle to get them up on plane. This is the way
it was intended to be run. [ exhaust gas blows into the prop to cavitate
it, so the engine can get up into the power curve. } Once the boat
starts to move the exhaust is drawn through the center of the prop. As
long as you stay within the recommended rpm range, and the boat does
seem to be accelerating, I wouldn't worry much. Blow out while turning
is another issue. If at half throttle, you can steer from side to side
without prop blow out, the motor is probably mounted at the right height
and your using the right trim angle. Full throttle blow out, while
turning, can happen on almost any high speed bass boat. Answer? Slow
down, trim down, before turn. Basically, there is a balancing act going
on here between performance, speed, and handling characteristics. Also,
the better the prop, the better this blow out problem is addressed. The
better the prop, the better they run. {  When it comes to props, Speed
has no price barrier. }

 
 
 

Doel-Fin?

Post by Sealegs9 » Sun, 05 Jul 1998 04:00:00

I use the stingray model fin on my 22ft stingray cuddy,works good for me its
one piece is one better who knows you would have to try them all out on your
boat to find witch one would cost you 1or2 mph at wot.