Cruising flat and level problem

[1971ChargerRT]

All,

New member here but owner of a 2005 ZT 230 since 2007. Very low hours due family and health but now getting back into things. Only about 100 hours. My 230 ZT has a 6.2 MPI MercCruiser with Bravo 1 outdrive. When I plane out and just want to casually cruise at lower speeds, the boat lists badly to starboard or port.

Regardless of how I balance the load or trim tab settings or the trim of the outdrive. Between 23-35 MPH it just won't stay level across the beam. It looks weird and feels very uncomfortable riding.

Has anyone had this experience with a ZT? Any suggestions? Thank you.

 

[hotdaddy27]

I have a ZT240 (quite a different boat), but I have never experienced any listing issues.

Was the boat stored outside? Could there be water trapped somewhere?

HD

 

[1971ChargerRT]

Always inside and covered on a lift in season. I will check that idea anyway. Thanks.

 

[oddly excitered]

Welcome to the forum, great screen name, when you get some pics up throw in some of the car!!

 

[Jimway]

Are there any of those tournament type of ski boats around when you experience these uncomfortable roll tendencies?

 

[1971ChargerRT]

Plum Crazy purple, 512 stroker with fuel injection, 430 HP at wheels. 5-speed manual, and serpentine belt system for accessories. Looks stock until you look close. Nut and bolt hand built by Muscle Car Restorations in Chippewa Falls, Wisconsin.

 

[1971ChargerRT]

Hehehe. No, no wake board turbulence.

 

[Gimme Fuel]

Plum Crazy purple, 512 stroker with fuel injection, 430 HP at wheels. 5-speed manual, and serpentine belt system for accessories. Looks stock until you look close. Nut and bolt hand built by Muscle Car Restorations in Chippewa Falls, Wisconsin.

OOPS! This is a boat forum, but we do love our muscle!

Welcome to the Obsession!

 

[sim]

Has it always done that? How many blades on the prop?
Is it possible that that's just the side to side tippy feeling of a deep vee?
I know that my deep v 23 ft Check doesn't feel quite as flat and stable side to side as my Check with less vee. Although a 4 blade prop made a big difference.
When was all the extra horsepower (weight and torque?) added?

 

[1971ChargerRT]

Off topic. I will put pics in the proper forum. My apologies.

 

[Old Navy]

Sounds like it needs a different prop.

 

[1971ChargerRT]

Always has done it. Not just a tippy feeling though. It rides with a quite a list over. It looks screwy and feels uncomfortable. I guess it's just getting itself to one side of the V or the other.

Maybe a 4 blade would help.

 

[1971ChargerRT]

Always has done it. Looks like it wants to ride on one side of the V or the other. I don't want to have to cruise at 40 mph to keep it level. The rides go to quick that way also.

Could be I do need a 4 blade. Any recommendations?

 

[Old Navy]

What prop is on the boat now?

 

[1971ChargerRT]

Bravo 3-blade 25

 

[illMATTic]

Bravo 3-blade 25

That is a big prop to cruise 25-30 mph.

I wonder if the extreme low RPM's have anything to do with it.

 

[1971ChargerRT]

It is a Mirage 25. Bravo is the outdrive.

 

[sim]

It is a Mirage 25. Bravo is the outdrive.

I switched from a mirage to a bravo 1 4 blade in a 24p. I like it.

 

[keith4216]

25 pitch prop on 320hp sounds like alot of prop.
Maybe your fighting the tourge of the big prop at cruise speeds?

 

[1971ChargerRT]

thanks to all. I will make some testing runs with different props this weekend.