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Old 09 April 2014, 17:12   #1
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trim tilt leak

ok hoping for some advice! Today gave the engine and boat a quick squirt with the hose to remove all the cobwebs Refitted the battery after charging and tried to tilt the engine up. Plenty of electrickery but the engine didnt move. Funny thought I ?? worked a few days ago.
Inspecting the power tilt bit in the engine bracket saw fluid squirting out a small hole below what im guessing is the filler/level cap.
Stupid questions now... dont laugh... should there be a plug/screw in this hole? Is it a drain hole? Could it have been dislodged with the hosing?
Its a 96 Mercury 60, waiting for the mechanic to come and service it but dont want to give him more work to do.
Theres a pipe on the transom side of the outboard leg that has a plugged end, whats that??

help
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Old 10 April 2014, 11:10   #2
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The tube with the plug is likely your speedometer hose. Works by sensing pressure generated through a small hole in the leading edge of the lower unit; pressurizes the tube, and the gauge reads the pressure.

Don't know about your T/T problem, sorry.

jky
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Old 10 April 2014, 12:57   #3
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Interesting, thanks.
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Old 11 April 2014, 14:10   #4
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as jyasaki says the tube is for a speedo,I used to joke they are accurate to the nearest two hundred miles an hour. The t/tilt problem if the oil is coming out of the tube with the yellow plug in it your t/tilt sounds as if its knackered or is the oil leaking out of the yellow filler plug?
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Old 11 April 2014, 15:06   #5
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No it's not coming out the yellow plug but a hole beneath it. You can see it better here
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Old 11 April 2014, 15:09   #6
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If the fluid is squirting out, rather than a weap at an 'o' ring, then something isn't right. I thought there might be corrosion, but after seeing the picture, it's fine. I know the early Yammie units (pump) used to rust like a spanner in briny! Not sure what that hole is?

The other option could have been worn carbon brushes on the pump, but that wouldn't explain the fluid loss. Tohatsu use Mobil ATF220 fluid. Not sure what Mercury units use? Remember to purge air from the system if you do have to bleed it.
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Old 11 April 2014, 17:15   #7
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Think I fancy replacing the whole unit!
Where's the best place to find a new one??
Is it much of a job to change?
Thanks for the replies
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Old 11 April 2014, 17:27   #8
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they use just normal atf fluid and there fairly easy the top pin can be a pain but bar that fairly straight forward new units arnt cheep mind ......
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Old 12 April 2014, 03:35   #9
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gary222, if you buy a new t/tilt unit, I used to put the unit in the vice, and with a battery extend the ram out as far as it will go, using a battery that you put on your bench putting the wires across the terminals , one way the ram will go up,reverse the wires and the ram will go down,check the oil level, I would do that a couple of times. When its fitted to check thats it has bleed I would raise the obm on the button, undo the manual release screw not to far out (2/3 turns out)and push it down by hand I wouls do that until I was satified that it went up and down ok.It was bloody hard doing that procedure on a V6 obm.
You can use atf oil in the t/tilt unit
only check/top up oil when in a fully tilled position
dont work under it unless safely blocked.
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Old 12 April 2014, 13:53   #10
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Thanks for the advice !
Turns out the small hole had an Allen Screw thing in it. I think this was part of the valve arrangement where the fluid flows one way or the other. Up or down. Corrosion between the two metals must have eaten away at it until the fluid was forced out of the rotten bit by me raising the engine.
The anodes are not on their last legs quite but are scabby looking. Apparently this stops them working so well so this didn't help.
I wonder what other bits are dodgy?
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