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-   -   issue with Malibu when in gear, need help (http://www.wakeworld.com/forum/showthread.php?t=794987)

Michael 08-09-2012 2:24 PM

issue with Malibu when in gear, need help
 
So I have an 07 malibu VLX, and all the fluids have been changed and plugs have been changed also. when the boat is in idle it runs perfect and smooth, then I put it in gear and the boat runs super rough and the drive vibrates like I have a bent prop, add a little rpms and the problem goes away. Any suggestions?

tyler97217 08-09-2012 2:26 PM

I want to say I can remember similar symptoms from a distributor cap.... Bout time to replace that? I am no mechanic though

Michael 08-09-2012 2:28 PM

Yeah that was my last thing. I just wanted to make sure before I went and dumped cash for nothing.

boardjnky4 08-09-2012 2:30 PM

well, it's never a bad idea to replace the rotor and cap. it's pretty cheap, and good to know that it's done and in good shape. it's a basic tune-up item.

kskonn 08-09-2012 5:54 PM

I have seen this once when a coupler was getting worn out on the drive shaft. I am not a mechanic but my boat did exactly what you were describing and that was the cause. Cheap fix.

yjwrangler95 08-09-2012 5:56 PM

check your rpms at idle in and out of gear.

Michael 08-09-2012 11:52 PM

Ok great I will try the cap first. Were would the coupler be located?

talltigeguy 08-10-2012 3:46 PM

I am not a genius with boats by any means...

But I think it should be pretty easy to tell the difference in a vibration that occurs from an engine that is running rough and if it might be from the drivetrain.

I would pop the engine hatch and watch and listen to the engine while it does this vibration. I suspect that you can tell if the vibration is resonating through the drive train into the boat, or from the engine into the boat.

It is not unusual to have a very small bend in the prop that only oscillates at certain prop RPM's. Could have even hit a small to medium sized fish to get a prop off balance.

johnny_defacto 08-10-2012 3:50 PM

x2 and next time on the water, rev your engine at all engine speeds with the tranny disengaged and see if you can recreate the vibration with engine only. If not, then start checking the drive train and prop/prop shaft

joebob 08-11-2012 12:21 AM

Damn right Diggs aint no mechanic. Arn't you the guy swith the H1? Sounds like you need a high speed balance of the prop. Take it to the shop guy.

Michael 08-13-2012 10:41 AM

Its the drive train. I'm not going to say its the prop because this only happens when I put the boat in gear. When I add RPMs it goes away. the prop packing has been leaking lately, could that be the cause?

jbird 08-13-2012 10:53 AM

I would doubt a leaking shaft seal would cause vibes...A bent prop or shaft alignment issues could be like a tire out of balance...You only feel it at different rpm's! Sure it's not an idle problem...IAC valve or TPS?

Michael 08-13-2012 11:30 AM

I just made an appointment at my local mechanic, it seams like this fix is beyond me.lol

shawnmdarnell 08-16-2012 4:40 PM

Any updates yet, I am having the same issue. My shaft is leaking pretty good too and thought that might be the problem.

Michael 08-20-2012 4:48 PM

So I just received a call and the mechanic is saying there is something wrong with cylinder #1. The fun begins.

Michael 08-21-2012 10:44 PM

Rocker imploded, and bent lift rod... no compression in the cylinder.

Michael 08-21-2012 10:45 PM

Quote:

Originally Posted by shawnmdarnell (Post 1776394)
Any updates yet, I am having the same issue. My shaft is leaking pretty good too and thought that might be the problem.

You might want to bring that boat in before you ruin your motor if your having the same problem.

markj 08-22-2012 12:16 AM

Is this an Indmar motor in your boat?

markj 08-22-2012 12:19 AM

Hopefully you're still under warranty since it's an 07.

Michael 08-22-2012 8:57 AM

No im not under warranty, If im not mistaken indmar only gives a 3 year warranty.

baitkiller 08-22-2012 9:29 AM

Have your wrench bender check the riser and gasket for leaks. Typically a bent push rod is due to a valve that has stuck in the guide. This is usually either lack of lubrication or corrosion from moisture entering the cylinder when at rest.
Is it an intake or exhaust valve that failed?
What engine?

shawnmdarnell 08-22-2012 4:35 PM

Could you feel a loss in power?

Michael 08-22-2012 8:33 PM

its the monsoon 340

Shawn,

There was no noticeable loss of power, just when the boat would drop into gear you could see something was off balance (engine was rocking a bit)


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