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Old 03-08-2019, 11:28 PM   #1
skwoodwiva
 
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Default Fast idle linkage finished.

Voila


A West Marine part.
https://www.westmarine.com/buy/c-she...1?pCode=127714


Pic 1 on
Pic 2 off- the screw (3/16) is tight & off rotation stays put.
Pic 3 part needed.
Pic 4 now you will want this too?

The key ring is to keep the stud from turning.
There is some yellow teflon tape bound under the nut, I added to keep the nut from turning when "off".
You do have to baby-sit it & press up or down to arrive at the RPMs you want 1800 seems to be reported as good. I shoot for 2000. It is fickle to be sure.

Operation
I rotate yoke & set the rod on the "ledge" adjacent to the plug.
Play with pedal up or down to get my 1800. Not too much downward as even a slight tap will release it completely.

When done
Rotate the yoke to about vertical or beyond.

Safety musings

Hmm. I see the visual concerns you all have. Yet let someone produce the same linkage and let them then pipe up. I have tried to get it to catch "on" without using 1 hand (& foot) and I have nothing to be concerned about.
This is really a delightful out come as I too had concerns. I have chewed on this for a long time. I have size 14 shoes yet I always use my toe area and there is never a need go up on the body/structure that is not "pedal". The tightness of the pivot is a security as well as its location- an unused (at least by me) area of foot movement.

Now (do?) you all do know that the brake use cuts out any throttle input.

Yet I know it would not sell well without somehow a more visual & dedicated lockout.

Modifications

Could a "fast pin" be used instead of a bolt?
Yes. Please your Wife & others. The pin will allow for easy removal.
Do not.exceed 3/16 as the web structure will be compromised. There is a 3/16 cavity already. Drill from the passenger side to start the passage.

Yet the pin would leave a loose & floppy pivot.
The ledge of the housing structure provides such a precarious catch point as well as the the fact that the rod is floppy too there being only a nut face that relies on throttle spring for pressure to keep it from falling out of position.
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File Type: jpg 20190128_191132.jpg (53.0 KB, 98 views)

Last edited by skwoodwiva; 03-09-2019 at 10:14 PM.
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Old 03-09-2019, 09:33 AM   #2
Cheyenne
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Default Re: Fast idle linkage finished.

Sorry but I have reservations over the safety of your design!

It is NOT 'fail safe'.

You say the pivot is 'tight' but what would happen if your shoe/boot where to accidentally hit the screw when driving down the highway and knock it down and then lock you on a moderate throttle opening? Surely an accident waiting to happen.

I feel you need to add something to the design to prevent the device from accidentally engaging.

Back to the drawing board.

Keith.

Edit to add a possible modification: If you where to slip a length of tubing over the end of the bar that was longer than the bar then it could not engage on the shoulder of the plastic moulding. Just make sure it could not get hooked on anything else in the vicinity.
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Last edited by Cheyenne; 03-09-2019 at 09:36 AM.
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Old 03-09-2019, 12:26 PM   #3
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Default Re: Fast idle linkage finished.

I agree. It needs some sort of fail-safe. That was my first thought wen looking at it, if I were to hop in with my size 13 steel toes, I would surely hit the bar and lock it in when driving.

Maybe put a length of rubber hose over it when not in use that would allow it to bend back away from the catch if inadvertently activated?
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Old 03-09-2019, 01:24 PM   #4
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Default Re: Fast idle linkage finished.

First. Congratulations on an ingenious design.

I completely agree with the safety concerns and comments.

My suggestion would be to use a fast pin or even a simple nail to install the toggle aka yoke when needed. Remove the complete assembly when not in use. That puts everything back to OEM design.

https://www.amazon.com/Aerofast-Inc-.../dp/B002GPHSXE
Added:
For reference only. Don't pay that absurd shipping.


vic
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Old 03-09-2019, 02:23 PM   #5
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Default Re: Fast idle linkage finished.

Hmm. I see the visual concerns you all have. Yet let someone produce the same linkage and let them then pipe up. I have tried to get it to catch "on" without using 1 hand and I have nothing to be concerned about.
This is really a delightful out come as I too had concerns. I have chewed on this for a long time. I have size 14 shoes yet I always use my toe area and there is never a need go up on the body/structure that is not "pedel". The tightness of the pivot is a security as well as its location an unused (at least by me) area of foot movement.

Now (do?) you all do know that the brake use cuts out any throttle input.

Yet I know it would not sell well without somehow a more visual & dedicated lockout.

Part https://sprinter-source.com/forum/at...3&d=1552149614

Perplexed…

Last edited by skwoodwiva; 03-09-2019 at 03:41 PM.
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Old 03-09-2019, 02:59 PM   #6
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Default Re: Fast idle linkage finished.

Quote:
Originally Posted by Aqua Puttana View Post
First. Congratulations on an ingenious design.

I completely agree with the safety concerns and comments.

My suggestion would be to use a fast pin or even a simple nail to install the toggle aka yoke when needed. Remove the complete assembly when not in use. That puts everything back to OEM design.

https://www.amazon.com/Aerofast-Inc-.../dp/B002GPHSXE
Added:
For reference only. Don't pay that absurd shipping.


vic
The pin would leave a loose & floppy pivot.
The ledge of the housing structure provides such a precarious catch point as well as the the fact that the rod is floppy too there being only a nut face that relies on throttle spring for pressure to keep it from falling out of position.
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Old 03-09-2019, 03:51 PM   #7
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Default Re: Fast idle linkage finished.

Quote:
Originally Posted by skwoodwiva View Post
The pin would leave a loose & floppy pivot.
The ledge of the housing structure provides such a precarious catch point as well as the the fact that the rod is floppy too there being only a nut face that relies on throttle spring for pressure to keep it from falling out of position.
Add a rubber cushion or other insert to keep it from being loose and floppy?

The engine is initially depowered with the application of the brakes, but is that something that should be relied upon for a design?

As I once told an apprentice who apologized for questioning one of my designs. If I can't explain/defend my ideas and designs then maybe something needs to be changed.

vic

Added:
A captured nut and knurled cap bolt or wing bolt will provide the clamping action you say is needed.
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Last edited by Aqua Puttana; 03-10-2019 at 03:09 PM.
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Old 03-09-2019, 04:14 PM   #8
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Default Re: Fast idle linkage finished.

Quote:
Originally Posted by Aqua Puttana View Post
Add a rubber cushion or other insert to keep it from being loose and floppy?

The engine is initially depowered with the application of the brakes, but is that something that should be relied upon for a design?

As I once told an apprentice who apologized for questioning one of my designs. If I can't explain/defend my ideas and designs then maybe something needs to be changed.

vic
It is the right kind of floppy as is.

Not just initially.

Let your pin be incorporated by those concerned with safety.

I updated the OP.

Last edited by skwoodwiva; 03-09-2019 at 04:23 PM.
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Old 03-09-2019, 07:11 PM   #9
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Default Re: Fast idle linkage finished.

T1N, what year? Due to ECU programing, an IDLE STICK will not work on a 2015 OM 651. Not sure about earlier years. Your contraption is impressive but a complicated and dangerous "Idle stick."

A wise member in this forum admonished me serveral times, "If that ain't broke, don't fix it."
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Old 03-09-2019, 07:30 PM   #10
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Default Re: Fast idle linkage finished.

Quote:
Originally Posted by Bobnoxious View Post
T1N, what year? Due to ECU programing, an IDLE STICK will not work on a 2015 OM 651. Not sure about earlier years. Your contraption is impressive but a complicated and dangerous "Idle stick."

A wise member in this forum admonished me serveral times, "If that ain't broke, don't fix it."
Good to know about the non t1ns. Any stick bracing from the console cover or anything but the lone throttle assembly is going float more than this one. I used a pvc stick & it just was too flexy.

I can achieve 1800 +/- 200 or so. Once warmed to normal.

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