Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 10-12-2011, 11:46   #1
Senior Cruiser
 
skipmac's Avatar

Cruisers Forum Supporter

Join Date: Oct 2007
Location: 29 49.16 N 82 25.82 W
Boat: Pearson 422
Posts: 10,209
Mercruiser Stern Drive Tilt Stuck in the Up Position

OK. My dirty little secret. I have a power boat that's not a dinghy and need some help.

This is a 1994 Mercruiser with an Alpha One stern-drive. It has been sitting on the trailer for about 8 months with the drive tilted all the way up. Went out to crank and run it and the stern-drive will not tilt down.

1. The batteries are fine.

2. Switches are operating correctly.

3. Motor sounds strong and sounds like full rpm in up and down but the drive doesn't budge.

4. Fluid reservoir is full.

5. Jumped up and down on the drive and tried the power tilt again, still no movement.

6. If I hold the switch up the motor runs for a second and bogs down like normal when the drive reaches max up or max down position.

From the symptoms I am guessing it is something in the pump or valve section of the trim/tilt unit. Anyone familiar with these and any quick checks I can do without total disassembly?
__________________

__________________
The water is always bluer on the other side of the ocean.
skipmac is offline   Reply With Quote
Old 12-12-2011, 08:19   #2
Senior Cruiser
 
skipmac's Avatar

Cruisers Forum Supporter

Join Date: Oct 2007
Location: 29 49.16 N 82 25.82 W
Boat: Pearson 422
Posts: 10,209
Re: Mercruiser Stern Drive Tilt Stuck in the Up Position

Fixed, if anyone is interested.

Got a 250 lb mercruiser mechanic to jump on the outdrive while I hit the down trim switch. Of course this would not have worked if he had not been a Mercruiser mechanic.

Without disassembly his best guess was a stuck valve in the hydraulic system. Suggested tilting it down slightly while the boat is laid up.

At least I now have a way to get on the water while the sailboat is still in overhaul mode.
__________________

__________________
The water is always bluer on the other side of the ocean.
skipmac is offline   Reply With Quote
Old 25-01-2012, 17:14   #3
Registered User

Join Date: Dec 2009
Posts: 175
Re: Mercruiser Stern Drive Tilt Stuck in the Up Position

Leaving your drive stored in the up position isn't the best, especially in cold temps and with bellows of age. Your u-joint bellows takes set, being stretched out on the bottom side. Best if you can store with drive in full down position for periods of time.

Have also heard of stuck drives and a good jouncing will free it up. Most suggests it's the rams that are stuck. Also when your drive is stored up, leaves all of the trim rams rods exposed to elements.
__________________
US1Fountain is offline   Reply With Quote
Old Yesterday, 12:44   #4
Registered User

Join Date: May 2016
Posts: 2
Re: Mercruiser Stern Drive Tilt Stuck in the Up Position

I am having the same problem. However the oil was very milky in the tank. Would this cause the shafts to rust?
__________________
RatzelsRide is offline   Reply With Quote
Old Yesterday, 12:55   #5
Senior Cruiser
 
skipmac's Avatar

Cruisers Forum Supporter

Join Date: Oct 2007
Location: 29 49.16 N 82 25.82 W
Boat: Pearson 422
Posts: 10,209
Re: Mercruiser Stern Drive Tilt Stuck in the Up Position

Quote:
Originally Posted by RatzelsRide View Post
I am having the same problem. However the oil was very milky in the tank. Would this cause the shafts to rust?
Milky oil is the classic indication of water in the oil. Water certainly promotes rust so that could be a problem but I would still consider the rams are stuck if the drive has been stored tilted up for a long period.

I don't use my power boat very often and almost ever time I get it out the drives won't go up or down. It has become standard procedure for me to bounce on the drive while my wife plays with the trim/tilt buttons. So far it works every time. I would give that a try but still you need to drain all the oil and refill a couple of times to get the water out AND find the source of the water intrusion.
__________________
The water is always bluer on the other side of the ocean.
skipmac is offline   Reply With Quote
Old Yesterday, 14:26   #6
Registered User

Join Date: May 2016
Posts: 2
Re: Mercruiser Stern Drive Tilt Stuck in the Up Position

He is trying to remove the trim arms and is having trouble with the back part. He can't get them to come off the pin
Is there a trick to remove these ? I sure hope so cuz he's driving me nuts. Lol
__________________
RatzelsRide is offline   Reply With Quote
Old Yesterday, 15:46   #7
Senior Cruiser
 
skipmac's Avatar

Cruisers Forum Supporter

Join Date: Oct 2007
Location: 29 49.16 N 82 25.82 W
Boat: Pearson 422
Posts: 10,209
Re: Mercruiser Stern Drive Tilt Stuck in the Up Position

Quote:
Originally Posted by RatzelsRide View Post
He is trying to remove the trim arms and is having trouble with the back part. He can't get them to come off the pin
Is there a trick to remove these ? I sure hope so cuz he's driving me nuts. Lol
There's a pin on both ends of the arm. Do you mean the end over the propeller or the end at the transom of the boat? Either way why remove the arms? If the arms are just jammed so the tilt won't move up or down then you can probably fix it without taking it apart. In fact it might be easier with it not taken apart.

This was how the Mercruiser mechanic from the local shop fixed mine. Get the biggest person you know to stand on top of the outdrive and bounce up and down while you push the trim/tilt buttons. Don't just hold the button down, you might burn out the motor or the pump. Bump it for down AND up, holding it a few seconds in each direction at most. That's worked every time for me.
__________________

__________________
The water is always bluer on the other side of the ocean.
skipmac is offline   Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
DSC Position Request from Handheld with Boat's MMSI Captain Bill Marine Electronics 74 16-02-2013 16:09
The Proper Fixture for Water-Cooled Stern Tube RigelKent Propellers & Drive Systems 15 25-11-2011 05:43
Merc hp165 Stern Drive Sea Pump Impeller dave and kate Propellers & Drive Systems 0 21-10-2011 23:42


Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities


Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 21:56.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.