Carb OIL???

I thought somebody was going to say he's pulling as fast-one on you, like, "You only put GAS in the carb!!" You know- like muffler bearings...

I would assume you only need oil ON the carb to lube the bearing pins. What's the oil resevoir for?

You can still check the usual stuff like points, rotor, plugs, timing & mixture, any of which would make it run funny. You know- tune-up.

thx

The carbs have pistons which move up and down inside, the oil serves as a damping fluid to keep the pistons from jerking up too rapidly with a sudden increase in throttle deflection.

you know Will I had almost forgot about that pic , think I might have nightmares now

What are you guys? Men or Sheep?!!!

Ok guys here it is. I was talking to a old guy at a BSA. meeting and he looks the car over a little and asked if it ran decent. So i started her up and hes impressed. Accept it idles kinda rough not to bad just a little bit. It has done this since i got it.

He asked when was the last time i checked the carb oil? Tryed looking it up in my chiltons but cant find it . The dog ate my book!

Anyways I was wondering if there is suposed to be oil in them and what kind?

The cards are round tops. I think from a 72.

I know i should know this. And i know i will get slammed for not .

Thanks Bill

mistery and atf are both 5wt oil, the recommended weight is 20w . the lighter wt oil will cause a lean mixture stumble from idle . It feels like a timing issue but it is caused by a lean fuel condition off the line. 10-30 would be the secound best if you cannot find fork oil

Bill, a search on the subject of SU oil will show how many opionions there really are on the matter. Everyone seems to find one that works for them. I use to run mine dry but again I was not city driving only wide open on the track. As mentioned the viscocity of the oil will govern how fast the piston raises and lowers the needle in and out of the gas jet in the carb. Makes for smoother acceleration and deceleration especially in moments of hard on and off the throttle. I found what works for me best is Marv. Mystry Oil! If you do add some it only takes acouple of CC's to fill it, not much at all.

You mention that you are noticing this at idle and what about driving? anything then?

You will probably find your problem in the mixture and the syncronization of the 2 carbs with each other. Timing adjustment. Also a small vacuum leak around the intakes or a cracked hose can give you the run around too, especially if the leak changes as the car changes temprature too. I thought you had done a plug, wire, and cap change? So if you did? the next thing I would tend to is carb adjustments. There is alot posted here about setting up SU carbs.

Good luck.

I would say, it depends on if we are driving or riding , but that would just curl your toes-depending on whether you are driving or riding !

Will

I would say, it depends on if we are driving or riding , but that would just curl your toes-depending on whether you are driving or riding !

Will

Will, Will, Will. I'm a "driver", always have been, always will be. :nervous:

But Carl, What(or who) are you driving?

Now Sema images are in my head-sooooo Muuuuch better!

Will

In my younger days, I wasn't too picky in who, err what I drove. A '49 Dodge PU, '64 Dodge Dart, '71 Ford Pinto, '75 Toyota PU, then I tripped over my first Z. Been stuck there ever since.

The "who" list is longer than my johnson, so I'll skip that list.

You Cad! You fiend! You bounder! You must be tired-but happy!

Will

It's called "Mutton Ruttin". Victor.

Bill-

You spelled it wrong... Stoopid is correctly sprlled with two ZEROs..