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Old 01-19-2013, 04:50 PM   #1
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Wiper Motor Questions

Hey everyone,

I am getting ready to replace my wiper motor and add at least one to another front window (there is currently only one wiper on the three windshields). However, I am not sure what length shaft I should buy. The bulkhead is 1.5" think and the current shaft length is 3". But it looks too long to me. Should it stick out 1.5" like the picture below shows? Should I upgrade the motors? Current one looks pretty cheap. Finally, the center window opens (swings upward) Is there something special for that?Thanks for the help y'all.

Tom-
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Old 01-19-2013, 04:54 PM   #2
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Mine stick out that much, but I then I have wanabee windows.
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Old 01-19-2013, 05:20 PM   #3
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I have 3. all stick out. The central window once opened, but by the time I bought her, that window had been varnished shut (or possibly screwed shut too) and the hinges removed. I gave away the long SS bars used to push it open a couple of years ago. Removing them from the inside gave me an improvement in interior space. Several years ago I had one from which the smoke escaped, so I had to go and buy a new one. There was no option at the chandlery I frequent, so I bought the same cheap one. So far, no more smoke has escaped.
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Old 01-19-2013, 05:22 PM   #4
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Greetings,
Mr. Gonz. Shouldn't matter I would think. Upgrade the wiper motors? Only if the current model of wiper isn't doing a good job. My $.02.
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Old 01-19-2013, 05:59 PM   #5
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I like rain x no needed for wipers
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Old 01-19-2013, 06:21 PM   #6
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If you fit a longer stub it may change how the blade sits on the screen, ie one end pressed hard,other end not touching enough. If the current motor otherwise did the job, for quite a while, easiest is a new same same. Might look long, but if it works...
I looked at replacing mine because the splines were worn out, PO had put in extra grub like screws and glued arm to stub. The job of removing the old motor required extensive dismantling (boat built around wiper motor?), I re-glued it. Hope your dismantling is less.
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Old 01-19-2013, 06:35 PM   #7
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Quote:
Originally Posted by funangler View Post
I like rain x no needed for wipers
Ditto.
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Old 01-19-2013, 06:50 PM   #8
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Quote:
Originally Posted by koliver View Post
Several years ago I had one from which the smoke escaped, so I had to go and buy a new one. There was no option at the chandlery I frequent, so I bought the same cheap one. So far, no more smoke has escaped.
LOL! I just had the smoke escape from mine. I never knew is was so critical to the operation of the wiper motor. Now I'm wishing I had plugged that hole to keep the smoke in for just a little longer!

Mine look like this:

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Old 01-19-2013, 07:23 PM   #9
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Greetings,
I'm pretty sure I've posted this here before but in case anybody missed it...

Lucas Replacement Smoke Kit
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Old 01-19-2013, 08:34 PM   #10
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Thanks for that post. I had a British car once and I lost ALL of the wiring harness smoke one evening while trying to impress a new girlfriend. That didn't go well. I have avoided anything wired by the Prince of Darkness (Lucas) ever since. I didn't know my wiper motors were by Lucas.
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Old 01-20-2013, 08:09 AM   #11
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What's weird is that the current shaft is 3", but a lot of the replacements I see at Defender and Jamestown are either 2.5" and 3.5". Need to decide if I go shorter or longer.
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Old 01-20-2013, 11:02 AM   #12
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https://www.surpluscenter.com/sort.a...=wiper%20motor
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Old 01-20-2013, 12:25 PM   #13
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LOL! I just had the smoke escape from mine. I never knew is was so critical to the operation of the wiper motor. Now I'm wishing I had plugged that hole to keep the smoke in for just a little longer!

Mine look like this:

Looks like a TMC unit..... www.tmcin.com ...search wiper..
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Old 01-20-2013, 09:00 PM   #14
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Thanks for that skidgear. I was looking at the AFI 34000 (2 inch shaft, pictured above) for around $140.

Your suggestion pointed me toward the TMC unit for around $60, or $85 with the 16" arm and blade. This unit has a 2 1/3 inch shaft.



Finally, I found an Ongaro unit with a 3.5 inch shaft for around $95. Tom, you might find this one compatible with your vessel.



I'm leaning toward the TMC unit since its shaft size appears most compatible with the 2 1/2 inch model I am replacing. At $85 with the new arm and blade, it seems like a good value, but I've never heard of the brand. Does anyone have experience with TMC units and their quality?

Thanks for the info , skidgear. You probably saved me $60. I owe you one!!
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Old 01-20-2013, 10:11 PM   #15
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TMC is marketed here, heads, pumps, electrical parts. Not bought any so can`t say on quality. Pricing is usually below competing products.
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Old 01-20-2013, 11:31 PM   #16
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WOW!!! Thanks!

I am thinking that I might go from my current 3" to 2.5" instead of 3.5" because I am thinking that the lower angle of the arm could help the spring apply a greater load onto the glass. Am I wrong understanding that the lower angle loads energy into the spring more than the higher angle because the arm, when off the motor, wants to collapse to a tighter angle?

**SIDE NOTE** I am not sure how they measure these. Is it 3.5" to the END or just the threaded part?
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Old 01-21-2013, 03:21 AM   #17
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I recently replaced my two with Speich 38 to 6mm wall thickness units with pantograph arms. Very pleased with the result.
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Old 01-21-2013, 03:44 AM   #18
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The three wiper motor shafts on our boat extend out 3" or so because they have to clear the window frames. The center windshield panel is hinged at the top and can be opened out. The pivot in the wiper arm allows for this movement of the center window.

We replaced our stock center wiper arm and blade with a pantograph arm and blade a few years ago. The original motor was retained. The wiper arm and the parallel rod are both hinged to allow the window to be opened. We put a restrictor on the bar the window opening mechanism slides on so we cannot open the window farther than the wiper arm hinges will allow. But this is still quite a ways open.
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Old 01-21-2013, 06:09 AM   #19
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Anyone with any experience of the commercial-type horizontal wipers...like these:
www.imtra.com/wipers-straight-line-wipers.htm

OR with wipers that have externally mounted motors?
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Old 01-21-2013, 11:13 AM   #20
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I have a similar setup too, Marin. Do you see an advantage to a pantograph arm?

After looking at the less expensive motors Jeff posted, I am skeptical they are durable enough for marine use. Brass covered steel shafts don't sound like it would hold up over the stainless when that are right out there in front taking the direct salt spray. Maybe $100 per motor isn't as bad as I first thought, but for $30 each for the cheap ones, you can go thru three or four before you are at the cost of one nice one.
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