Hewes Tailfisher- Stuggling to Plane

[Savannah Maverick]

Hey guys,

I just got into a tailfisher with a 60Hp Yamaha.

absolutely love the boat. the only issue i am have is that the boat take a very long time to get on plane. Even with tabs down, and a dolphin tail.

think i should lower the motor?

has anyone else had this problem?

-SR

[MuddyBottomBluz]

Have you tried it with tabs all the up? What prop you running?

[captpn]

lowering the motor wont help. Sounds like the wrong prop.

[hawg]

Do you know what your getting for top RPM at wide open throttle?

[hawg]

Make that "you're".

[Wanaflatsfish]

18 hours ago, captpn said:

lowering the motor wont help. Sounds like the wrong prop.

Yep, sounds like it.....get the numbers off the side of the prop and post.

1.) brand prop

2.) numbers on the side will tell you size, pitch, etc.

3.) 3 blade or 4 blade

4.) What is your WOT with the current prop?

 

with this, it's fairly easy to diagnosis the topic.

 

dc

 

[Savannah Maverick]

I will grab a picture this week.

 

WOT is 22mph

[Savannah Maverick]

5 hours ago, Wanaflatsfish said:

Yep, sounds like it.....get the numbers off the side of the prop and post.

1.) brand prop

2.) numbers on the side will tell you size, pitch, etc.

3.) 3 blade or 4 blade

4.) What is your WOT with the current prop?

 

with this, it's fairly easy to diagnosis the topic.

 

dc

 

its a 4 blade

[Savannah Maverick]

5 hours ago, Wanaflatsfish said:

Yep, sounds like it.....get the numbers off the side of the prop and post.

1.) brand prop

2.) numbers on the side will tell you size, pitch, etc.

3.) 3 blade or 4 blade

4.) What is your WOT with the current prop?

 

with this, it's fairly easy to diagnosis the topic.

 

dc

 

44 rpm wide open.

cavitation plate is 2 inchs above hull tunnel

4 blade prop.

boat will only run 22 mph wide open at 42-44 rpm.

 

PROP INFO:

Powertech 4 blade

9442102-001-001-001

scd4r13pym90

 

[SSN651]

Sounds like a spun hub to me. Also, could be dropping a cylinder.

Chuck  😁

[Savannah Maverick]

Here is a picture of location.

[NCTribute]

2 hours ago, SSN651 said:

Sounds like a spun hub to me. Also, could be dropping a cylinder.

Chuck  😁

With a spun hub he would be hitting the rev limiter.

[mulligan]

Is the motor running properly?  Linkage and all allowing it to run wide open?

I have no time on a Tailfisher but SCDs spin up pretty easy and I would imagine you would get more RPMs out of a 13" unless someone did some major work to the prop.  Just guessing here.

[SSN651]

11 hours ago, NCTribute said:

With a spun hub he would be hitting the rev limiter.

DOH, that's true

Chuck  😁

[captpn]

you should be turning ~5500+ rpm's.  

fix the rpms, and you'll fix the lazy getting on plane you mentioned.

[polliwog]

I was going to say the same thing, that motor should run over 5500 rpms.  You should do at least 35mph.  looks  like the motor is too high  and you are blowing out,but I don't under stand why the rpms are so low at WOT.  Something isn't making sense.    When you have the  tabs down and have a rooster tail you are fighting the motor.  You must be plowing a lot of water.  The boat should sit on the back 3rd of the hull when you are at WOT.