Loss of "traction" on hard turns

[krazykatz911]

I have a 2005 Stingray 195LS with 4.3 litre sx drive.

When I am cruising and make a hard high speed turn, the engine rpms stay the same or go higher, but all propulsion stops, I have to lower the throttle and slow down for it to noticeably regain propulsion.

I am not sure if this makes a difference, or causes it?, But I have the smart tabs installed.


Is this normal, or should I be concerned?

 

[gbeltran]

Re: Loss of "traction" on hard turns

Probably ventilating the prop, try trimming down before you make or during the turn. I have a Stingray and it will do the same if I have the drive too far up and crank the wheel. You can also try a different prop, you running a 3 or 4 blade, I think the 4 tolerates a little more up trim in the turn. No scientific proof, just my experiece from driving someone elses boat vs. mine with a 3 blade.

 

[krazykatz911]

Re: Loss of "traction" on hard turns

I was thinking of getting a 5 blade stainless steel prop. I wonder if that would help correct this, and I wonder if it would be better performance, and smoother?

 

[steelespike]

Re: Loss of "traction" on hard turns

I feel a 5 blade is overkill and I think they do better on high parformance boats.
A 4 blade should be plenty for your boat While not carved in stone ; the 4 bld should improve hole shot,stay on plane easier at reduced throttle,run smoother and handle better.
What size prop would depend on your present performance.
If you read"read this first" at the top of the page and get us the info we can tell better if youre setup works and what changes may be needed.

 

[krazykatz911]

Re: Loss of "traction" on hard turns

Thank you!

I think I may try a 4 blade. Is stainless steel the better way to go, or safer with aluminum?

 

[steelespike]

Re: Loss of "traction" on hard turns

To get the most typical results its best to stick with the same brand and material.
More than likely a ss prop would do better than al. But how much? and is it worth the approximate 3 times the price of al. Usually it is suggested to decrease pitch one inch
when going to a 4 bld.But that depends on your present performance.

 

[Texasmark]

Re: Loss of "traction" on hard turns

The props mentioned are all probably cupped as are most SS wheels. I know for a fact that cupping helps you to hold on in situations such as you mention. BTDT So whatever it is get it cupped; you won't be sorry.

Mark

 

[krazykatz911]

Re: Loss of "traction" on hard turns

The props mentioned are all probably cupped as are most SS wheels. I know for a fact that cupping helps you to hold on in situations such as you mention. BTDT So whatever it is get it cupped; you won't be sorry.

Mark

So I should get a prop that is cupped, or buy a prop and get it cupped? (what is BTDT)

 

[steelespike]

Re: Loss of "traction" on hard turns

"Been there done that"

 

[Texasmark]

Re: Loss of "traction" on hard turns

A full service prop shop can cup a SS prop, but if you buy one already cupped you should be able to figure that the mfgr put the right amount of cup to maximize the performance of that prop. I have 3 SS props from the same mfgr and the more the pitch the less the cup....in my case props are from 17P to 24P.

Other things are engine too high on the transom, trim out too far, prop pitch too high for the load in the boat, turning too tight at too high a speed, rough water, obstructions immediately forward of the engine like a keel, or like on my alum boat, a piece of angle that covers where the sheets of metal are joined at the keel, or foreign objects lodged around the lower unit like moss.

Mark

 

[bayoucat58]

Re: Loss of "traction" on hard turns

I have to agree with TexasMark! High speed turnarounds like to retrieve a skier or pick up your hat that has blow overboard ETC.ETC.. Can be a spontaneous action its natural. However i have seen people unaware that a maneuver is about to take place while standing are moving to a different seat and what not thrown out of the boat, seen collisions, groundings ETC.ETC. just last week a guy creamed a jet skier while trying to make a power turn and he had to get out of the throttles putting himself right into the jet skier. My rule of Thumb is simple safe practice. i do not power up i do not make any drastic maneuver's nothing without First looking to see that my crew is seated. And verbally let my intentions be known of whats going on and always,always take a good 360% look around your vessel and your surroundings' Ask yourself... if you are not in a competition whats a few seconds. Well life changing events happen in a singe second!! So happy boating buddy. Oh and watch out for those navy subs. They will sneak up on you LoL ... Had that happen in Chesapeake Bay cruising along i here a noise what i thought was a Whale blow i look left and what do you know, a beautiful sub breaking the surface about four hundred yards off my port quarter very cool. "Cat"

 

[zagger]

Re: Loss of "traction" on hard turns

Don't think you need a prop, just learn to use the trim. Next time out trim down a little before a sharp turn and see if the prop blows out, it it does repeat again with little more down trim till it goes away. On an I/O you need to work the trim as much as the throttle in order to maintain optimum performance from the package. Your tabs may actually contribute to the blow out as they keep the transom from digging in in a sharp turn.

 

[Texasmark]

Re: Loss of "traction" on hard turns

I was fooling around this AM and stumbled across Merc Marine's www prop selector. In there they discussed some of the advantages of their props and their Trophy Plus SS 4 blade is said to hold tight in turns.....so if a new prop is in order and you don't feel like doing a lot of trimming, might check out the www; very informative.

Mark