Chris cat hop after 80. Sometimes
it dosnt do it but allmost allways it will.

It still hop at 100.

Anyone know, does tunnel tab eliminate that hop ?

Does it do it in calm water more than rough.

yes a tunnel tab will help

straight shafts are worse than out drives but when you get the x high they will all hop and they will hop in calm water worse

More in calm water.

Have try many trim positions and different water condition
and it will hop allmost allways more or less.

Need to add tunnel tab.

Tab adjustment..

Should tab adjust in place before rising speed.
If it still hop put tab little more down
and try to rise speed again ..

or

can it adjust while running (when it start hop putting tab
down as much that hop stops ..)?

Thanks.

How about putting some drive spacers on and trying it.JOHN SR

I suppose you mean spacers for stern drives..

Boat has arneson Asd8 surface drives.

what props? turning in or out?

16.5x33 4blade cleavers turning out.

ok....i believe 5 blades turning in with some cup will help the hop but not stop it....that will not be your fastest props but help with the hop......what setups have tried?? thanks

I've never been in a cat that didn't hop... also be very careful with a tunnel tab! If you haven't ran a boat with one and it is in the wrong position when you turn it could result in you being more like a helicopter than a boat... just saying!

Havent any prob stock, those 4 blades are what we have.

Tested setups are different trim positions and different water conditions.

Looks like when drives are more down (little or none roostertail) the hop
Is smaller. When hop starts it cannot stop.