Mercury 150 xr6 Slips when at 2000 RPM and above

Joined
Sep 20, 2011
Messages
2
My Mercury is slipping when accelerating up to speed, it starts at 2000 rpm and gets progressively worse.
Revs like it is neutral and lets go.
It will reengage when the RPM lowers below the 2000 mark.
Any suggestions?

Thank you.
 

DavidAK

Cadet
Joined
Sep 13, 2011
Messages
19
Re: Mercury 150 xr6 Slips when at 2000 RPM and above

Ya, have your prop rebuilt.
 

ufm82

Master Chief Petty Officer
Joined
Jul 29, 2003
Messages
827
Re: Mercury 150 xr6 Slips when at 2000 RPM and above

Yep- classic symptons of a spun hub. If you have a pressed in rubber hub prop the rubber is worn and is slipping in the hub. You'll need to have the prop rehubbed. Aluminum prop I would assume? If it's worn at all may as well buy a new prop. If it's stainless you'll just want to have a new hub pressed in. The easiest way to check is to put a mark on the hub itself and the barrel of the prop. Run the boat and make it do what it is doing. Then look at the marks- they'll not be lined up anymore if the hub has slipped.
Since you have a Merc if you replace the prop buy one that takes the Flo-Torq hub. It's an insert that replaces the rubber hub and provides the impact protection that a rubber hub is supposed to provide. But, if the insert is damaged via an impact, you can just stick a new one in and it's cheaper than getting a prop rehubbed and faster too. You can do that on the water.
 
Joined
Sep 20, 2011
Messages
2
Re: Mercury 150 xr6 Slips when at 2000 RPM and above

Thank you for your response,
Is there anything else that would make it have these symptoms?

Once again thank you.
 

j_martin

Admiral
Joined
Sep 22, 2006
Messages
7,474
Re: Mercury 150 xr6 Slips when at 2000 RPM and above

No clutches in the LU. The gears either go or they don't. When they don't they make a lot of noise and throw parts at you.
 

ufm82

Master Chief Petty Officer
Joined
Jul 29, 2003
Messages
827
Re: Mercury 150 xr6 Slips when at 2000 RPM and above

There are other issues that could be causing the issue. Severe damage to the prop, having the engine mounted way too high on the transom (this would bring other issues along with it), having the engine trimmed too high (also would bring more problems), something causing severe turbulence in the water flow over the prop. But it's most likely a spun hub.
 
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