Non-functioning hand throttle

Hi all,

I have a non functioning hand throttle (on a 1975 911S), which is a real pain in the ass.

MY mechanic said it was something to do with incorrectly routed cables and would take up to 5-6 hours to fix, so I asked him not to fix it. I figure it can't be that hard, just time consuming, so I will probably have a go.

My question is as to how it all works. As I understand it, when the throttle is lifted it moves the throttle cable as if you pressed the pedal. The pedal in fact moves.

I think that the lever is missing the cable. How much effort and what sort of difficulty level is involved in investigating and remedying this?

Thanks

Cam

------------------
----------------
Cameron Baudinet
1975 911S

Cam,
In my '76 Carrera, the hand throttle:
The lever ends in the central tunnel as a white plastic "fork" that goes around the throttle ROD (not cable).
The throttle rod has a large ring that fits around it and is tightened by a screw.
Now when you move the hand throttle, the "fork" pushes the ring, thereby actuating the throttle rod (I can't remember the direction, but when you peek under the hand brake lever assy, you quickly find out).
So you have to lift the handbrake lever assy somewhat and look the relation of that ring to the hand throttle fork. It can be adjusted from the small opening, trust me.
Hey, nobody said it's all easy.
Hope this helps, GeorgeK

Cam- I have all the diagrams handy and I've just pulled it apart and fixed it on mine. Easy (ish). I'll show you on Saturday.

The part that's probably broken is made of soft plastic and joins the cable to the hand throttle. You can get it from Giltraps for about $20 NZ, but may need to order it. Mine looked like biscuit crumbs sitting in the 'transmission tunnel'.
When fixed, it makes warm up a breeze, and impresses passengers who are anmazed you have an extra lever to play with.

------------------
'72 911 TE

Thanks Matt!

Easier when someone can help! And thanks for the other assistance from GeorgeK too (I should have said rod, not cable, thanks)! I have a feeling that the plastic bit and the ring are missing, and that my mechanic was full of crap.

I actually have no interest in attaching it to impress people, I am keener on being able to scare anyone I let drive it by revving it up and down surreptitiously (sp?) at the traffic lights, or when they are slowing down (actually I'm guessing it doesn't have that much effect, but it would be fun).

They already get a sheen of sweat when I give driving instructions:

Be gentle with the gears, shift slow, oh and did I mention careful - it is kinda vague.
Pedals offset funny and hinged wrong way, so you might stall.
No assistance on brakes push them hard, they do work.

But all you guys know how it is! It is what I call "character" - see the why buy the 911 thread!

------------------
----------------
Cameron Baudinet
1975 911S


[This message has been edited by CamB (edited 07-05-2000).]

matt smith. would it be possible to get a copy of the diagram you were refering to in the reply. my hand throttle does not engage as well and i would like to fix it. i will have the seats out in the next few weekends to spray the carpet upholstery/replace shift bushing(s)/repaint various parts. tia.
bob
'68 911L

Hi,
Which years of 911s had the hand throttle? I keep hearing about it, and I do see a slot in the hand brake boot for one, but I've never seen one. Mine's a '76, built in July of '75, but no hand throttle. Mine does have a high idle at startup, though(1800rpms). Thanks!

------------------
Jeff
1976 911S

Bob- that's the best time to do it, and exactly when I did mine. Pull the seats (you could probably do it with one in..not sure) then dismantle the handbrake leaver to remove it. Haynes will tell you how. The throttle lever is self explanatory. I dismantled my whole handbrake/heater/throttle setup and rec-oed the lot (paint, grease, clean/adjust). The end of the throttle lever should have a plastic part about as big as a finger and white- although yours will probably be yellow, sticky and shapeless. This is what I used the diagram for -to actually see what the piece looked like as there was very little trace in mine. The Dealer just printed off the whole lot from his parts diagrams. Yours could do the same. I don't have a scanner sorry. Cam just lives down the road so its easy for me. It will be the broken bit. It connects to the lever and to the rod that runs from the gas pedal. The rod has a collar on it. The plastic bit rests against this collar and this is the bit you can adjust thru a small slot in the tunnel so as to avoid removing the whole handbrake assembly for simple adjustment.
The procedure is a bit fiddly but should take around an hour if you're keen. Good luck.

Cam,

After just completing a pedal box rebuild, I would offer this advice...the first thing I would do is remove the wooden floorboard from the driver side of your car and examine the throttle linkage. The "hand idle adjuster" is connected to the linkage directly under the throttle pedal. Simply pull back on the throttle pedal until it touches the floor of the car and hold this position. You should be able to shine a flashlight in there and verify that the hand throttle rod and the pedal throttle rod are attached to the triangular shaped linkage. If they are, your problem is elsewhere, but this is the first place I would check.

The "rods" that I refer to look exactly like the rods that are on your throttle bodies on your engine. I think that the hand throttle rod may have simply slipped off of the ball on the side of the throttle linkage. Hope this helps.

Bill


------------------
William Armentrout
1973 911T
2.7 carerra rs specs
www.geocities.com/william_armentrout

The white plastic part is called a drag link. It can be found in Stoddard's catalog #600.911.3 on page 66, item #6, part # 901.424.317.00. My 73S had the same problem. The original part was 26 years old and softened and broke apart. The repair wasn't too hard and it restored the hand throttle function. I was tempted to adjust that collar on the throttle rod but my mechanic pointed out excess wear in the throttle linkage elsewhere. After that was fixed every thing worked fine. Good luck.