Hello

i have ore i think i have 2 lab Bravo 28" props, LH and RH.

The have stamped diffrend marks in it. Can some one tell me what are the marks can tell about the prop.

Where they cam from and what are do with it ??



RH
W07B076

LH
<> YSICL


Thanks for some information.

These serial numbers are a code system we developed years ago at Mercury Racing.

The LH prop is a standard template Lab Finish Bravo 1 built in June of 2004.
The RH is a custom template Lab built in March of 07.

Obviously with the time that has passed since their builds, who knows what you have today.
Let me know if we can help with any of your propping issues in the future.


Brett

Thank you Brett.

I have a second RH lab 28" with GLIO L

What RH from this two fits best to the LH.

I use a Prop Slip Calculator from livorsi.
With a 28" lab prop what size I put in ? 27" 26" ?

Thanks for any help.

The GLIOL is the better match if nothing has been done to them since Mercury worked on them.
27-27.3 depending on the Lab recipe. I'd use 27.3

Brett

Thank´s Brett.

27.3 for Propsilp, ok that helps better understand tp calculate.

GLIOL and <> YSICL are a good set.
the W07B076 are not standart lab and works good for singel we have tested.
i hope i have understand it correct.

Props did
<> YSICL W07B076
LH 4844 RH 4826 at 121,6kmh DataTach
LH 5013 RH 5023 at 121,6kmh DataTach

You are welcome.

I do my best......

B

Hello Brett,

hope i have now nice props.


Bravo One 30

BB3027
BB3026

The propellers you have listed are props we built to our standard Bravo 1 Lab template. Of course we do not know what may have been done to them since that time frame.
Once you test them we can discuss the results.

Brett

I have test the probs.

Standart 28 Bravo
4880 rpm
121kmh

30 Bravo (29)
4980 rpm
123,8kmh

Rpm are locket from datatach, the are more and less a little bit, but are same.

Engines have now a new program and i can drive with less trim.

4950 RPM 11% 129kmh