Trim motor for '75 merc 1150

JeffM

Seaman Apprentice
Joined
Sep 4, 2001
Messages
31
OK, I've spent the obligatory 15 minutes searching this site for my answer before starting another topic, but I wasn't able to find anything on trim motors for my '75 Merc 1150. After spending over an hour wading around in 58 degree water trying to get my $#%!ing boat over to the $#%@ing launch ramp without the aid of the engine as the trim is stuck in the highest position I got it over to my local marina who tells me the trim motor is completely pooched and I'm looking at spending $300 on a new one as they can't be rebuilt. As I was more concerned about recovering from the severe hypothermia that had set in I didn't argue and just went home to take a hot shower.<br /><br />So, is this true about not being able to rebuild them? Unfortunately I didn't get his definition of pooched however I know there was power getting to the trim motor and when i pushed trim up I would hear an audible click and upon trim down there'd be nothing. I thought it was just the solenoid, but apparently not. If it indeed can't be rebuilt, where's a good place to check out prices? I checked out the marine mega mall here but didn't find anything.
 

kenthrussell

Petty Officer 2nd Class
Joined
Feb 22, 2001
Messages
132
Re: Trim motor for '75 merc 1150

hi there fellow canadian, they say they can't be rebuilt but yes they can, first take it apart as in pulling the rotor out and clean it up and check for any open windings or look to see if any are burnt, usually the problem is that moisture gets in them and the shafts on the rotors are mild steel they wil rust and just plainly get full of ****, they have bronze bushings in them which can be cleaned up or replaced, check the brushes too and the holders as sometimes what happens is corrosion gets in the brush holders and won't let the springs push the brushes on to the commutator,if everything checks out and this is your problem what i did to was put one end into a electric drill (the shaft on the rotor) and turn it and take some fine emery like 400 grit and polish up the surface where the brushes contact,also clean out the small grooves with a small knife, but if the rotor has an opening or the stator your beat to buy a new one, you can check this with a meter ,good luck! rebuilt mine 3 yrs ago and it still works good, ha ha then a year later had to the same with my hyd pump for my jack plate
 

kevlar3000

Petty Officer 2nd Class
Joined
Mar 20, 2001
Messages
194
Re: Trim motor for '75 merc 1150

I rebuilt my pump, the motor was fine my problem was the pump. I used my Merc guide to trouble shoot, went and bought the used parts and it was an easy fix.<br /><br />If that is not your desire, ebay is a great option for good prices on used Merc stuff.<br /><br />Good Luck!!
 

JeffM

Seaman Apprentice
Joined
Sep 4, 2001
Messages
31
Re: Trim motor for '75 merc 1150

Thanks Kent! I've printed your reply out and will be giving it a go in a couple weeks when I get back up there. I'm sure its a moisture problem as this problem started after the back end of the boat sank when leaving it cover-less in the rain for 2 weeks. (ya ya I know, I'm an idiot). <br /><br />Do you boat on the canal? I keep my 28' 69 Trojan on the canal up near Kirkfield (actually Bolsover). Haven't made it all the way down to Trenton yet, maybe next year.<br /><br />Oh, thanks for the Ebay rec Kevlar, I seriously didn't think there'd be old Merc stuff there, I'll check it out. Your 1150 still pulling strong?
 

kevlar3000

Petty Officer 2nd Class
Joined
Mar 20, 2001
Messages
194
Re: Trim motor for '75 merc 1150

Hey Crush,<br /><br />There is a ton of old merc stuff on ebay. I have seen a bunch of old trim units there. My 1150 sadly went doa in May. It was a result of a suspect rebuild according to the wrench that I traded it too. I now run a 78 V6 150 Merc on my CV 16. It has run perfect....
 

JeffM

Seaman Apprentice
Joined
Sep 4, 2001
Messages
31
Re: Trim motor for '75 merc 1150

Not so much on the site right now, but i'll check back in a week or so.<br /><br />150 on a Carlson? Wow! What's the top speed? I'm gonna guess 52. What did you top out at with the 1150 on it?
 

kevlar3000

Petty Officer 2nd Class
Joined
Mar 20, 2001
Messages
194
Re: Trim motor for '75 merc 1150

I am actually hitting 64 with a 22 pitch chopper. I am quite happy.... I was running 52-54 with the 1150 with a stock aluminum 21 pitch. There are some great prop deals on ebay!! What performance are you seeing?
 

Dunk

Petty Officer 2nd Class
Joined
Feb 11, 2001
Messages
127
Re: Trim motor for '75 merc 1150

Of course they can be rebuilt. If you don't want to tackle it yourself just take it to a local starter/generator rebuilder. 50-60 bucks and it will come back better than new..
 

JeffM

Seaman Apprentice
Joined
Sep 4, 2001
Messages
31
Re: Trim motor for '75 merc 1150

Hoy cow Kevlar, 64? That's amazing. I haven't gotten around to doing any prop work, but I did see those bad-boys on ebay and I do think I will be buying myself a xmas present. Right now I've only got a 19 pitch on it (it came with it) and am only seeing about 45. I'd like to pick up a 21. Now I've got some carb problems to take care of as well so I'm also not seeing tip-top performance out of it yet. I only bought it in late August so I haven't had time to spend on it. Next summer tho'! Probably take that trim motor apart myself, but the carbs i'll have done my a mech (I took apart the carbs on my '85 honda accord once. It wasn't pretty).<br /><br />Here's a picture of her. Gotta love that "Tower of Power"<br /><br />
glastron1.jpg
 

kevlar3000

Petty Officer 2nd Class
Joined
Mar 20, 2001
Messages
194
Re: Trim motor for '75 merc 1150

Man I love those boats!!! There is a picture of mine on the readers ride gallery at classicglastron.com. If you open the page it is the purple cv at the top of page 1. Once you get the carbs taken care of, at that motor running smooth I would throw a 21 pitch lazer 2 on. With that hull and Merc combo I think you would be pleased with the results. They are always on ebay and always in the 100 to 175 range.
 
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