300u idle speed, tach parts.. buncha ?s

Posted by JayWalt on January 20, 2007 at 10:46:25 from (24.223.138.48):

Hey Guys. I broke down and bought a tach cable for my 300u. ($32 =\) Got it today. When I was putting in the drive unit, the manual says to turn the hub until it stops (full gear mesh), then turn back one notch. Well mine turns all the way indicating that drive gear needs replaced. It still turns when I point the closed part of the hub to the distributor shaft, so it will work for now, I'll ge one when I can find one.
Now I started the tractor, and it idles at 1200 rpm when I have the throttle all the way down and the choke in. This is after only a few minutes of running. I thought maybe the tach gauge was messed up, so I got out my dwell tach meter and it shows 1100 rpm, which is not far off since the need rests at nearly 100 when the tractor is off. So how do I get the idle down?
A few things I've thought of but havent investigated yet is the carb setting (I had to adjust them when I first ogt the tractor because it was way off and wouldnt run for poo), govenor maybe out of whack? I also thught maybe it has to warm up for it to lower, but I thought that was just on newer fuel injected engines?
The manual says the minimum governed idle speed is 400 to 450rpm. I'd like to get the tractor in the 700rpm area. Now maybe this idle is normal, I dont know and maybe that manual spec speed is when the tractor is given a sudden load and the engine drops in rpm. The tractor seems to run fine at the current idle and seems if it went down alot more maybe it wouldnt run so smooth, I'm not sure. This is a loader tractor and there will be alot of idle time, so for fuel efficiency the better idle the less fuel I'll use.
The hour gauge is hours at 1750rpm, with a max rpm of 2200, and my idle of 1100 1750 is nearly the middle and so I thought maybe it was normal, but I dont know.
I would also like to check the dwell, but I dont know what the specs are for this engine (c169 gas). It's not like I could fix the distributor shaft lobe as I'm too cheap to buy something like that or even think about messing with the pump, but I'm just curious.

Thanks for any help guys, I appreciate it as always!!

We are supposed to get 1-3" tomorrow so maybe I can do a little plowing =)

Replies:

• Re: Cam angle/Dwell Janicholson 16:57:50 01/20/07 (0)
• Re: 300u idle speed, tach parts.. buncha ?s JayWalt 15:19:16 01/20/07 (0)
• Re: 300u idle speed, tach parts.. buncha ?s teddy52food 14:50:20 01/20/07 (0)
• Re: 300u idle speed, tach parts.. buncha ?s JayWalt 14:05:46 01/20/07 (1)
  • Re: 300u idle speed, tach parts.. buncha ?s CNKS 14:47:16 01/20/07 (0)
• Re: 300u idle speed, tach parts.. buncha ?s CNKS 11:34:52 01/20/07 (0)
• Re: 300u idle speed, tach parts.. buncha ?s CNKS 11:29:20 01/20/07 (0)

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