David, Thank you for your thoughts, I appreciate them.
When our son bought the aftermarket Zenith copy I was a bit apprehensive because they don't have the best of reputations. They tend to suffer from distorted mating surfaces that lead to exactly the type of air/fuel leak you describe. For that reason I opened it up to check the float level and fit of the O-ring before very carefully putting it back together again and fitting it. I'm beginning to suspect a wiring fault but I'll not see the Landy now until the weekend. The plan is to send the original genuine Zenith to be refurbished so that we will have a quick swap spare. If the problem persists we may do that sooner than we planned to see what happens. Best regards, Lawrence -----Original Message----- From: David Ashworth [mailto:[email protected]] Sent: Wednesday, July 25, 2012 12:33 PM To: mogtalk2 Subject: Re: [mogtalk2] (non Mog) Series Land Rover cuts out turning left I'm not so sure about the sticking float theory. Whilst it is true that Zenith carbs can suffer from this - it doesn't seem to fit your symptoms. When a float sticks, or the fuel inlet flow is impaired, then fuel enters the the chamber at a reduced or zero rate. The symptoms (fuel starvation) occur once the engine has used the available fuel in the chamber. So, if going around left hand bends was causing the float to stick, the effect would be seen further down the road. Now, it is possible that if you have a long straight BEFORE the left hand bend and you have been pushing the Landie enthusiastically befre going through the gears into the bend, that starvation symptoms would occur. It wouldn't matter though whether this was left or right handed. If the float is sticking due to lateral forces - this may have occurred before said straight. I've recently had cause to be all too familiar with this problem. I've had problems with my 87 cvh Weber dft equipped 4/4 coughing and spluttering to a halt, only to limp home on a very sensitive throttle. I eventually traced the problem to a sticking primary float (the left one as you look down on the dft from the offside). Took a complete strip down of the carb and a set of new gaskets to sort it. Just one other thought. You say that the Zenith is a new aftermarket carb. It is possible that you can see exactly the same symptoms as fuel starvation if there is the slightest of gap between gaskets, allowing the engine to draw air without first getting an air fuel mix. Again this wouldn't answer the left hand bend observation - but it's not uncommon when putting on new carbs to overlook just how important the air seal is. Best regards David On 25 Jul 2012, at 10:30, LawrenceLowe wrote: > > ...you've seen us then, oops secrets coming out now!! I'll suggest that, > from a distance. A trip to Glenrothes should provide more than sufficient > roundabouts! > > Lawrence > > > -----Original Message----- > From: Colin Mackay [mailto:[email protected]] > Sent: Wednesday, July 25, 2012 9:51 AM > To: mogtalk2 > Subject: [mogtalk2] (non Mog) Series Land Rover cuts out turning left > > > You will have to drive it in the middle of the night with the bonnet off, > Les strapped to the front bumper looking into the engine bay and do brisk > anti-clockwise laps of a roundabout then! > > Colin > > > > > ------------------------------------------- > View posts on The Mail Archive > http://www.mail-archive.com/[email protected]/ [http://www.mail-archive.com/[email protected]/] > > Modify Your Subscription: https://www.listbox.com/member/?&; > Powered by Listbox: http://www.listbox.com ------------------------------------------- View posts on The Mail Archive http://www.mail-archive.com/[email protected]/ [http://www.mail-archive.com/[email protected]/] Modify Your Subscription: https://www.listbox.com/member/?&; Powered by Listbox: http://www.listbox.com ------------------------------------------- View posts on The Mail Archive http://www.mail-archive.com/[email protected]/ [http://www.mail-archive.com/[email protected]/] Modify Your Subscription: https://www.listbox.com/member/?member_id=22459785&id_secret=22459785-4a39ddf8 Powered by Listbox: http://www.listbox.com
