Mercruiser #1 trim limit switch?

fishrdan · May 24, 2008

I found the insulation of the trim limit switch wires is hard/cracking and missing in places, so I need to find out how to replace the switch. After looking around for online manuals I didn't find any of them that referenced this old style switch on my 72 #1 drive (S/N 2901044). Here's a shot of the the upper transom assembly from outside the boat.

I can see the cover/arm that contacts the switch, but don't know what is involved in replacing the switch, all the manuals I've seen reference the new style switch. Looks like it's going to be a real bear since from what I can see, the bell housing needs to be removed to get enough access to remove the switch.

I haven't noticed problems with the switch,,, except for 1 time a few years ago the drive wouldn't go down while launching the boat.

What are the ill effects of jumpering the bullet connectors and bypassing this switch? Or am I stupid for even asking that question...

Don S · May 24, 2008

Re: Mercruiser #1 trim limit switch?

What are the ill effects of jumpering the bullet connectors and bypassing this switch? Or am I stupid for even asking that question...

I would bet that 99% of those older one drives out there have the system bapassed or just plain don't mess with it and use the tilt button to trim up.
If you trim up to high, the rpm goes up and the speed goes down.
Trim is a constantly changing adjustment due to wind and waves, and soon you can feel and hear the proper trim and won't need that trim limit switch at all.

JustJason · May 24, 2008

Re: Mercruiser #1 trim limit switch?

I'm the 1% then... coz i've got one sitting out in my yard and it works.
The switch is a pita to change... and not really worth it.
BTW fisherdan, that switch only limits trim up... doesn't have anything to do with the drive going down. theres no need to jump the connection or anything like that... just to trim out push in on the top two buttons at the same time on your trim control switch.

fishrdan · May 24, 2008

Re: Mercruiser #1 trim limit switch?

Cool deal! That's one less thing I have to worry about.

This boat has had ??? (only God knows) PO's and I've had to fix lots of hacks.

I know the 3 button trim switch is supposed to function different than it does as I only have to push 1 button for up and down, don't have to push 2 buttons at 1 time to get the drive to raise or lower,,, or how ever it's supposed to work. At one time someone put a Scotch Lock (the scourge of all electrical problems) across 2 wires in the trim system. I haven't looked to see what the affecting switch does, but I'm sure it has something to do with locking out the useless trim button...

ziggy · May 24, 2008

Re: Mercruiser #1 trim limit switch?

pushing the one button for up i'd think means it's bypassed. i'm in the 99%, mine don't work, i use tilt w/ caution., middle and top button for up. anyways, that ain't what i wanted to put ya onto....

After looking around for online manuals

this is..... http://forums.iboats.com/showthread.php?p=1520997#post1520997
check out hm's post #5. 1+ gb download, assuming it's available, seems like it is.

JustJason · May 24, 2008

Re: Mercruiser #1 trim limit switch?

bottom button is for trim in
middle button is for trim out
top + middle button for same time is tilt up.... or trailer.

ziggy · May 24, 2008

Re: Mercruiser #1 trim limit switch?

get the service manual while ya can. when ya got a service manual for yer rig, then.... yer hip, if ya can dig it........

fishrdan · May 24, 2008

Re: Mercruiser #1 trim limit switch?

ziggy said:
this is..... http://forums.iboats.com/showthread.php?p=1520997#post1520997
check out hm's post #5. 1+ gb download

Sheesh, how long does it take for that bad boy to download (1.5MB DSL)? I've tried to get it on several occasions and stopped after a few minutes of download circle thingy going around, and around,,, and around,,,,,,,, and around.................. got too dizzy staring at the circle thing and had to cancel the download before I yaked

ziggy · May 24, 2008

Re: Mercruiser #1 trim limit switch?

i ain't the computer wiz by any means. with cable broadband, it locks up my puter, can't do anything while downloading it, + took 20+ miin. round abouts to down load it...... wait and let it loadz.....

fishrdan · May 24, 2008

Re: Mercruiser #1 trim limit switch?

Wholly molly, going on an hour and the manual still hasn't downloaded

Maybe I should quit monkeying around on other sites while it's doing it's thang...

Bondo · May 25, 2008

Re: Mercruiser #1 trim limit switch?

Sheesh, how long does it take for that bad boy to download

Ayuh,......

Just spent the last 2 Hours,......

Roadrunner cable connection...........

'course,... That included saving a copy to the harddrive,............

Donno if I even Dare to open it to see if it's all there,.....

Does anybody know if these files can be loaded onto a DVD,... Package says DVD+R, 4.7GB,....
I know my 'puter does burn DVDs....
Otherwise I guess I'll need to buy some CDs....

Don S · May 25, 2008

Re: Mercruiser #1 trim limit switch?

Yes, it does work putting them on DVD. That's how I saved all mine

I was also able to change the URL from the #1 manual and get #2 to work too.
So here is a workable link for Merc SM #2 Also over 1 GB in size
http://www-alt.mercurymarine.com/mnetdata/SERVICE/CRUISER/Servmanl/02/cover.pdf

ziggy · May 25, 2008

Re: Mercruiser #1 trim limit switch?

I know my 'puter does burn DVDs....

yep, me too...

Otherwise I guess I'll need to buy some CDs....

i just did that, but got dvds. the file i want to transfer is 4.06gb mostly pdf files....

Yes, it does work putting them on DVD. That's how I saved all mine

how did ya do this? do ya have a programs of some kind? when i try to c/p it. the computer gives me some kinda error message, sorry can't remember what it said as last try was a couple days ago... but so far i've been unsuccessful in transferring to dvd..

Don S · May 25, 2008

Re: Mercruiser #1 trim limit switch?

Yes, it takes some software. Nero Express, here is the free download for it.
http://www.softpedia.com/reviews/windows/Nero-Express-Review-65448.shtml

Bondo · May 25, 2008

Re: Mercruiser #1 trim limit switch?

Ziggy,.... I've got a program on my desktop that came with my 'puter,... Hope it works,...

Don,........ You da Man,..... I'm onto that 1 too....

I just Wished you'd made the comment to me sooner, back when the backdoor was Wide Open,....
I still slap myself silly with the "Duh" moment, of not saving All of them to disk........

I'll be back in a Few hours,.........

Don S · May 25, 2008

Re: Mercruiser #1 trim limit switch?

Bond-o said:
I just Wished you'd made the comment to me sooner, back when the backdoor was Wide Open,....
I still slap myself silly with the "Duh" moment, of not saving All of them to disk........

Look what all I made work! Have fun

fishrdan · May 25, 2008

Re: Mercruiser #1 trim limit switch?

Don S said:
Ought to keep ya busy for the rest of the weekend.

Thanks Don!

(and I mean that in a good way

)

Bondo · May 25, 2008

Re: Mercruiser #1 trim limit switch?

Don,.... The manual #1, cover says book 1 of 2,.. sections 1 thru 5...

The table of contents to the left of my screen lists 7 sections,..
Is this file actually Both Books of the 2,..??

And,.....
Your Right,....... I'll be burning All Weekend now,......
So much for floating the boat tomorrow...........

Don S · May 25, 2008

Re: Mercruiser #1 trim limit switch?

Yes, it's both books. Same with Manual #3

JustJason · May 25, 2008

Re: Mercruiser #1 trim limit switch?

shoulda got them all while you could

Mercruiser #1 trim limit switch?

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