Trim switch on throttle
 

Hi Everyone! Im hoping someone can help. The trim on the throttle stopped working when i installed a new battery. The trim on the back works fine. I think its the switch and it just was a coincidence that i replaced a battery. Any ideas?


Thanks

Re: Trim switch on throttle
 

Are you sure you connected all of the wiring back onto the new battery, the same way as the old one? Sounds to me like one or more wires might not be connected properly.

Re: Trim switch on throttle
 

The wires are the exact way i took them off. Is it possible one shorted on something and that blew the switch on the throttle?

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Re: Trim switch on throttle
 

Thanks alot Wet Willy. That helped out alot. Ill let you know what happens.:wink_thumbup:

Re: Trim switch on throttle
 

Hi there. I just had a very similar problem - if you are having a trim up issue. After you check the wires and they all look fine it may be an issue with the port side (left) sensor on the outdrive - that is if you have the Bravo outdrive. There is a round plastic deal that you can unscrew. Make sure that is clean on the inside - if it's not it will not get the current to the switch and the trim up will not work. I cleaned mine and it works as it should.

P.S. I called a boat repair shop and told them that the sensor was bad (not knowing I could clean it) and they quoted me $200 for parts and 4 hours of labor because they have to pull off the outdrive to put the new sensors in.

Re: Trim switch on throttle
 

I have the same Problem with my throttle switch for the up position... I try to clean the plastic piece but can I get a little more detail where its located?

Re: Trim switch on throttle
 

Re: Trim switch on throttle
 

Thanks willy,

I'll be cleaning it when I get home from work. I'll let you Know how it goes. :)

Re: Trim switch on throttle
 

I knew joining this site would be a good thing. My 240 Talari has a similar problem. The trim up won't work at all. Trailer switch up and trim down are good. My difference is that the trim gauge reads full up all the time when under way
Any ideas on where to start the checking would be greatly appreciated.:confused:

Re: Trim switch on throttle
 

As described above: Trim limit and/or position senders are apparently most often the culprit. Mercstuff.com has detailed instructions on their adjustment and replacement: Trim Limit & Sender Switch Adjustments (mercstuff.com).

I wonder why it seems it's always trim up that fails?

Btw: Seller told us trim up didn't work on our boat, when we were first looking at her. Said the trim position gauge probably didn't work, either. Well, the trim position gauge did work and, tho trim up didn't work, initially, by the time we returned to the launch to put her back on the trailer, it did.

Jim

Re: Trim switch on throttle
 

Thanks Jim, My research so far points to the trim position send and limit switch. I'm first going to try to get the dealer to fix it under warranty, if that fails, is this something an average car guy can fix?

Re: Trim switch on throttle
 

Replacing the trim limit and trim position senders requires complete removal of the outdrive and the bellhousing. The mercstuff link SEMIJim provided will give you the details. You'll need some special tools to R&R the bellows.

My trim gauge quit a couple of years ago. The contacts for the reisistance disc were all corroded, in the process of cleaning things up I broke the disc itself... :cursing:

The trim gauge itself is more cosmetic that functional IMHO. I usually trim to the best match to the sea conditions, what my tach and speedo are reading, but mostly just by a seat of the pants feel...

Re: Trim switch on throttle
 

You're welcome.

Looks that way, from the mercstuff docs. But I think it was the mercstuff docs that recommended some Special Tools. Could get kinda $pendy. (I haven't researched it, other than to peruse the mercstuff site. I'm crossing my fingers and praying ours doesn't give us any trouble.)

I would probably get the tools and do it myself. Odd thing: I generally don't work on our own cars, tho I used to wrench on cars extensively, back in the day, but I will work on our own boats. I guess I enjoy working on boats :). I also think part of it is, doing it myself, I know it's done right. Consider: Your car breaks down and, usually, the worst that happens is you're stranded by the side of the road, on dry land, and a towing service comes and gets you. But when you're out in the middle of a large lake, like the kind we're on, maybe out of cell and VHF range, and something fails, well, that's a whole 'nother story! I think if we owned ATVs or snowmobiles I'd work on those, myself, for the same reasons.

Jim

Re: Trim switch on throttle
 

There is a pair of products, DeoxIT and ProGold, that are reputed to be very good at removing contact corrosion and protecting contacts from corroding, respectively. Our courtesy lights and bilge pump weren't working, and I found it was fuse/fuse-holder corrosion. I removed all the fuses, some of which were very difficult to get out, treated all the fuse holders with those two products, and now the fuses snick in and out of those fuse holders like new. I wonder if treating the trim sensors would make sense?

Perhaps, but a non-functional gauge would annoy me. I would have to fix it :p

Jim

Re: Trim switch on throttle
 

Thanks a lot guys, I'll try cleaning the discs first to see if that clears the problem. After reading the instructions for this, I'll take it in. Not something to do in the Wisconsin woods

Re: Trim switch on throttle
 

After looking in the repair manual there seems to be a manufacture tool that is needed to unscrew the star shaped trim sending unit located under the plastic trim adjusting cap and bottom. Not quite sure if the problem lays in the plastic electrical component or in the star shaped bolt that screws into the out drive in witch the trim sending unit adjuster bolts over top of.

Re: Trim switch on throttle
 

Thanks, I don't have a factory manual yet, hope one comes up on ebay soon.
By "star shaped" I assume you mean a torx bolt. I'll try cleaning and adjusting next weekend.

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I took my throttle off and found that the wires leading to the back had corroded about a foot back on a connector piece. Hooked it all up and everything works great. Thanks for everyones help. :D

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Another great idea, thanks. Next weekend I'm going on a corrosion busting day and clean everything related to the trim. Fingers will be crossed.
Thanks

Re: Trim switch on throttle
 

So how high should the outdrive go to not cause damage. mine abruptly stops at the middle point on my guage, from there, i need to use the trailer button to get it any higher. I thought this was normal, just double checking if you please.

;)

Re: Trim switch on throttle
 

The Alpha I Gen II outdrive on our '94 182 Barchetta behaves the same way.

But along those lines: Is it safe to operate the engine with the throttle disengaged from the shifter with that button on the axis on the shift/throttle control, while the drive's "parked" in its trailering position, or is that hard on the drive?

I only ask that because I accidentally did that, yesterday, after replacing the prop in the water. A friend suggested I could damage the drive that way because, tho it's not in gear, there's still power being transferred to the stern drive.

Jim

Re: Trim switch on throttle
 

Do not operate the boat with the engine any higher than the trim button will take it. If you do - only at idle speeds and I wouldn't do that very long.

The gears are not made to work at those severe angles and will cause damage $$$$.

You won't be happy with the results.

I have run mine up higher when going through some stumpy fields on the Brazos river but not for long.

Re: Trim switch on throttle
 

Like I said in earlier post - use the trailer button to raise it on trailer but don't run it like that. If you trimmed any higher at speed it would handle really squirrely and do a lot of damage.

The trim button going halfway is normal - and you don't normally need to use all the way up to get top speed and good handling. Only time mine would be that high would be stumpy or shallow areas (going very slow).

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It'll be hard on the U-joints, and could potentially overheat if your drive is raised so that the sea water intake is out of the drink...

Actually, I believe it stresses the U-joints.

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what did you clean it with? Just curious I have the same problem

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I have the exact same thing happening. What did you find out?

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HI JGreen

It sounds repeative as the others have metioned but the trim sender is the place to start as my trim gauage reads full up. My sender is bad and is being replaced now as we speak.
On my Brovo Three drive its a puck looking unit with a cable lead on side of drive. My trim works but other than looking I had no idea where it was other than feeling where she was based on getting the bow where I wanted her. And yes the transom trim switch works fine on mine reguardless. i need the drive up in my slip so its imperrative to know where the drive is.
Im no mechanic just going thru this now and pretty handy and I want to be able to help

Paul

Re: Trim switch on throttle
 

1995 Mariah Talari 180 /3.0 . I’m having an issue raising the outboard … it won’t raise out of water? I hit the throttle trim up it won’t raise when it’s down. The trim works on water. I was able to jump the solenoid on pump/motor to raise the outboard. Is there something I’m not doing correctly to raise the outboard with the switch??

Re: Trim switch on throttle
 

I think i answered your question over on the Facebook group but in the event it was someone else, your 'up' solenoid needs replacement and you may as well replace them both while you're at it. Here's a link to to the troubleshooter and wiring.