Thread: Zenith Carb, new. (any good?)

I have heard that some of the new ones are more prone to having the top warp, but I have yet to hear of a specific person who has had this happen.

That price is about what you would expect to pay for one.

John

It might be worth your while to look at ERC2886 CARBURETTOR ZENITH TYPE | shop | www.lrseries.com | L. R. Series, which works out to $A105 plus shipping.

The Zenith 36IV is also available from other overseas sellers, but these are the cheapest, and the carbs all seem to be the Indian made models.

There's nothing kicking around on ebay other than Gary's offering - I've got a permanent search set up.

Peter

Yeah right thats a fair bit cheaper!

Ive gone with Gary's though - it will get here faster and if its rubbish I can go back to him.

Ill post the results when I get it.

So I got the carb today, fitted this arvo - looks good so far.
I haven't driven it yet but the idle is much more steady and throttle response is a lot better.

Just a question about the mixture on these carbs though...
How do you tell when the mix is set right?
The manual basically says "turn until best idle speed"
What I always find is that there is a massive range (many turns) between the poor running "in" and poor running "out" positions...

Any advice?

Originally Posted by ashhhhh

So I got the carb today, fitted this arvo - looks good so far.
I haven't driven it yet but the idle is much more steady and throttle response is a lot better.

Just a question about the mixture on these carbs though...
How do you tell when the mix is set right?
The manual basically says "turn until best idle speed"
What I always find is that there is a massive range (many turns) between the poor running "in" and poor running "out" positions...

Any advice?

If this is the case, the most likely problem is that the idle speed is set too high. This should be 500rpm, about half the idling speed on modern engines. As you get closer to the correct idling mixture, reduce the idling speed to keep it close to that figure. If you have no easy way of determining the actual speed, reduce the idling speed to as low as it will keep running to adjust the mixture, and keep reducing it when it goes up as the mixture gets closer. (If the idling speed is too high, only a small part of the mixture going into the engine comes from the idling system, so of course, changing the mixture on this makes little difference)

Ensure that the throttle linkage is not limiting the idle speed, in particular the spring on the bell crank should push the linkage against the idle stop.

John

Bought Carby from the above link in U.K.
Arrived yesterday ........genuine Britpart
Fitted today and engine now Purrs

Just wondering, which way do you go on the mix screw to make it richer?
In or out?

Originally Posted by ashhhhh

Just wondering, which way do you go on the mix screw to make it richer?
In or out?

In, from memory - it adjusts an air bleed.

John