bravo 1 slipping while planning off
 

I have a Bravo one that is all original with 610hours. I have never had a problem with the drive until today. The boat runs up until around 2200rpms where is when it will sound like the outdrive is spinning. If you try to go half throttle you'll see the RPMS jump and the boat not moving at all. Its almost like a tranny in a car when its trying to downshift but can't. Any Ideas? I have inspected both exterior views of the outdrive itself and the prop, prop turns freely and outdrive looks god. Is the drive blown?

Re: bravo 1 slipping while planning off
 

Sounds like a prop hub slipping.
Is it a rubber hub prop?

Re: bravo 1 slipping while planning off
 

have to agree or possibly an engine coupler

Re: bravo 1 slipping while planning off
 

Its a Hdyromotive, I was under the impression those stainless ones are 1 part without hubs I was told. If its an engine coupler, Does the motor have to be pulled?

Re: bravo 1 slipping while planning off
 

hydromotive is a solid hub, yes if coupler mtr will need to come out, look behind mtr some times you can see rubber dust all over the place, its also possible its in the drive but check for coupler first....if you dont see the rubber dust take boat out and open hatch while tring to get on plane and see if they smell "rubber burning"

Re: bravo 1 slipping while planning off
 

to change the coupling you have to pull the motor i changed mine i moved the back seat forward removed sundeck and pulled the motor high enough and turned her around to get to the coupling and changed it also it is easier to do with the drive off

Re: bravo 1 slipping while planning off
 

Not only easier to change with the drive off, but 100% necessary.

You need to at least lift the engine to change a coupler. It is bolted to the flywheel and you need to remove the engine bellhousing.

You must have the drive completely off, because will need to realign the engine with an alignment tool.

Re: bravo 1 slipping while planning off
 

id go with coupler.

Re: bravo 1 slipping while planning off
 

I had a similar experience.. turns out the local prop shop trashed my prop, Looked OK to me (newbie) turns out they ground too much off. Mine would spin out and the engine would rev. I could slowly feather it to get on plane. New prop and I was back in business.

Re: bravo 1 slipping while planning off
 

I could be wrong, but I don't believe I've ever seen or heard of a coupler "kind of still work". I doubt your boat would even move if it was the coupler, much less hang on until 2200 rpm. I've had two of them go bad and there is no doubt what happened. There was a burning rubber smell and small and large chunks of rubber all over the place. I would try another prop if you have access to one.

Re: bravo 1 slipping while planning off
 

an engine coupler is made pretty much the same way a prop is with a rubber hub pressed in and yes it will slip as they start to go much as a clutch slips in a car or a prop hub will slip



have seen it many many times



.

Re: bravo 1 slipping while planning off
 

Update

Took the boat out of the water and removed the prop. We noticed the prop wasn't tight tight but it was secure. Put it back in the water, WOT no problems. My first thought was, WTF!? LOL! What should I do now?

Re: bravo 1 slipping while planning off
 

Drive it till it breaks :D :D

Re: bravo 1 slipping while planning off
 

what he said

Re: bravo 1 slipping while planning off
 

yessssssssssssssss

LOL

I plan on it now.

Re: bravo 1 slipping while planning off
 

One possibility, speaking from own experience :D , the prop may spin out when you come off plane because the drive is still trimmed out for high speed. I my case I thought the drive was shot but it was only the prop ventilating because of the high trim.

Re: bravo 1 slipping while planning off
 

One thing I was told it might be is Clutch cone in the outdrive. Any comments?

Re: bravo 1 slipping while planning off
 

I think you should still replace the coupler just to make sure .... :drink:

Re: bravo 1 slipping while planning off
 

It wouldn't slip like you described. It would either go into gear or it wouldn't.

Re: bravo 1 slipping while planning off
 

Check the vetilation / trim possibility before doing some expensive repairs. Mechanical failures are very seldom intermittant.

Re: bravo 1 slipping while planning off
 

Took it out for a drive. Went WOT, it took all 500lbs of tq no problems so im just gonna wait until it blows up or something and then hopefully replace the bravo drive in the winter time with maybe an XR drive (if they are any better)

Re: bravo 1 slipping while planning off
 

how loose was the prop and do you have thru hub or thru transome exhaust? if exhaust was thru hub and prop was loose....couldve been the exh. gas cavitating the prop.

we just changed a coupler last week, the rubber was intact and fine, no rubber smell, none of the typical signs, turned out that the coupler splines were totally stripped, they are aluminum and the drive shaft is steel. we think misalignment may have been the problem there.....or lack of lubrication!

Re: bravo 1 slipping while planning off
 

I would think that if this was him problem, his boat wouldn't even move when put in gear.

Did you replace it with the steel (A11) or the aluminum (A9) one?

Re: bravo 1 slipping while planning off
 

XR's are stronger, but I do believe the gears actually wear out faster. They also take more HP to spin. If you currnet standard Bravo is lasting, then I wouild stick with it or have it beefed up.

Re: bravo 1 slipping while planning off
 

duunoit,
it was part number ending in a9, we were told that there was only one made for the 502.....
what do you know about issues with those if any??
thanks

Re: bravo 1 slipping while planning off
 

none that I know of. the part number ending in A11 is the one with the steel sleeve instead of aluminum (I'm pretty sure).