2.25 petrol won't start

This site contains affiliate links for which LandyZone may be compensated if you make a purchase.
T

Tim Hobbs

Guest
Further to t'other thread, progress is being made...

Engine now turns over quite spritely but won't fire. I have a spark,
albeit not the strongest ever seen, but definitely a regular spark.

Disconnected the fuel at the carb and it's delivering plenty when
turned over.

But no hint of firing. Even after 30-60 seconds cranking the plugs
are bone dry - shouldn't they be showing evidence of petrol? If so,
why wouldn't fuel be getting there?


--

Tim Hobbs

'58 Series 2 88" aka "Stig"
'77 101FC Ambulance aka "Burrt"
'03 Volvo V70
 
In news:[email protected],
Tim Hobbs <[email protected]> blithered:
> Further to t'other thread, progress is being made...
>
> Engine now turns over quite spritely but won't fire. I have a spark,
> albeit not the strongest ever seen, but definitely a regular spark.
>
> Disconnected the fuel at the carb and it's delivering plenty when
> turned over.
>
> But no hint of firing. Even after 30-60 seconds cranking the plugs
> are bone dry - shouldn't they be showing evidence of petrol? If so,
> why wouldn't fuel be getting there?

Float chamber empty? needle valve/float stuck? Jets clouted up with detritous?

--
"She who says it cannot be done should not interrupt him doing it."

If at first you don't succeed,
maybe skydiving's not for you!


 
On Sun, 17 Apr 2005 15:40:22 +0100, "GbH"
<[email protected]> wrote:

>In news:[email protected],
>Tim Hobbs <[email protected]> blithered:
>> Further to t'other thread, progress is being made...
>>
>> Engine now turns over quite spritely but won't fire. I have a spark,
>> albeit not the strongest ever seen, but definitely a regular spark.
>>
>> Disconnected the fuel at the carb and it's delivering plenty when
>> turned over.
>>
>> But no hint of firing. Even after 30-60 seconds cranking the plugs
>> are bone dry - shouldn't they be showing evidence of petrol? If so,
>> why wouldn't fuel be getting there?
>
>Float chamber empty? needle valve/float stuck? Jets clouted up with detritous?

As I thought... I need to learn about how carbs work. Bugger....

Thanks :)
--

Tim Hobbs

'58 Series 2 88" aka "Stig"
'77 101FC Ambulance aka "Burrt"
'03 Volvo V70
 
On or around Sun, 17 Apr 2005 15:40:22 +0100, "GbH"
<[email protected]> enlightened us thusly:

>In news:[email protected],
>Tim Hobbs <[email protected]> blithered:
>> Further to t'other thread, progress is being made...
>>
>> Engine now turns over quite spritely but won't fire. I have a spark,
>> albeit not the strongest ever seen, but definitely a regular spark.
>>
>> Disconnected the fuel at the carb and it's delivering plenty when
>> turned over.
>>
>> But no hint of firing. Even after 30-60 seconds cranking the plugs
>> are bone dry - shouldn't they be showing evidence of petrol? If so,
>> why wouldn't fuel be getting there?
>
>Float chamber empty? needle valve/float stuck? Jets clouted up with detritous?

one of they. either the petrol in the carb has evaporated leaving spooge,
or the float valve stuck shut is my bet. Try a bit of percussive
maintenance.

--
Austin Shackles. www.ddol-las.fsnet.co.uk my opinions are just that
Once, when the secrets of science were the jealously guarded property of
a small priesthood, the common man had no hope of mastering their arcane
complexities. Years of study in musty classrooms were prerequisite to
obtaining even a dim, incoherent knowledge of science.
Today, all that has changed: a dim, incoherent knowledge of science is
available to anyone. - Tom Weller, Science Made Stupid, 1986
 
"Austin Shackles" <[email protected]> wrote in message
news:[email protected]...
>
> one of they. either the petrol in the carb has evaporated leaving spooge,
> or the float valve stuck shut is my bet. Try a bit of percussive
> maintenance.

Yup ,, tap the handle of a screwdriver on the top of the float chamber lid a
couple of times. Usually enough to free a sticking float.

Also try a squirt of fuel / wd40 directly down the inlet... if she splutters
on the fuel provided at least you can eliminate everything else.


Lee D


 
On Sun, 17 Apr 2005 15:51:45 +0100, Austin Shackles
<[email protected]> wrote:

>On or around Sun, 17 Apr 2005 15:40:22 +0100, "GbH"
><[email protected]> enlightened us thusly:
>
>>In news:[email protected],
>>Tim Hobbs <[email protected]> blithered:
>>> Further to t'other thread, progress is being made...
>>>
>>> Engine now turns over quite spritely but won't fire. I have a spark,
>>> albeit not the strongest ever seen, but definitely a regular spark.
>>>
>>> Disconnected the fuel at the carb and it's delivering plenty when
>>> turned over.
>>>
>>> But no hint of firing. Even after 30-60 seconds cranking the plugs
>>> are bone dry - shouldn't they be showing evidence of petrol? If so,
>>> why wouldn't fuel be getting there?
>>
>>Float chamber empty? needle valve/float stuck? Jets clouted up with detritous?
>
>one of they. either the petrol in the carb has evaporated leaving spooge,
>or the float valve stuck shut is my bet. Try a bit of percussive
>maintenance.

Go basically pour some petrol into the carb and give it a slap?

Sounds within my skill set....


--

Tim Hobbs

'58 Series 2 88" aka "Stig"
'77 101FC Ambulance aka "Burrt"
'03 Volvo V70
 
Tim Hobbs wrote:
> Further to t'other thread, progress is being made...
>
> Engine now turns over quite spritely but won't fire. I have a spark,
> albeit not the strongest ever seen, but definitely a regular spark.
>
> Disconnected the fuel at the carb and it's delivering plenty when
> turned over.
>
> But no hint of firing. Even after 30-60 seconds cranking the plugs
> are bone dry - shouldn't they be showing evidence of petrol? If so,
> why wouldn't fuel be getting there?

How old is the petrol mate?


--
Subaru WRX (The Bitch)

Series 3 Landrover 88" (Albert)

'"They called him Jimmy the gent"


 
On Sun, 17 Apr 2005 14:42:04 +0100, Tim Hobbs
<[email protected]> made me spill my meths when he wrote:

>Engine now turns over quite spritely but won't fire. I have a spark,
>albeit not the strongest ever seen, but definitely a regular spark.

You getting a spark on all the leads or just testing the one?
--

Wayne Davies, Harrogate 07989 556213

Just another point of view...
www.4x4prejudice.org
 
>>>>
>>>> But no hint of firing. Even after 30-60 seconds cranking the plugs
>>>> are bone dry - shouldn't they be showing evidence of petrol? If so,
>>>> why wouldn't fuel be getting there?
>>>
>>>Float chamber empty? needle valve/float stuck? Jets clouted up with detritous?
>>
>>one of they. either the petrol in the carb has evaporated leaving spooge,
>>or the float valve stuck shut is my bet. Try a bit of percussive
>>maintenance.
>
>Go basically pour some petrol into the carb and give it a slap?
>
>Sounds within my skill set....

OK - tipped about half a pint of fuel down the carb. Much gurgling, so
it went somewhere. Left it a few minutes (pudding was ready!) and
then turned it over - lots of coughing and half-running, then the fuel
ran out and it stopped again.

Hmm... Perhaps I didn't hit it hard enough?


--

Tim Hobbs

'58 Series 2 88" aka "Stig"
'77 101FC Ambulance aka "Burrt"
'03 Volvo V70
 
On Sun, 17 Apr 2005 20:52:58 +0100, Tim Hobbs
<[email protected]> wrote:

>
>OK - tipped about half a pint of fuel down the carb. Much gurgling, so
>it went somewhere. Left it a few minutes (pudding was ready!) and
>then turned it over - lots of coughing and half-running, then the fuel
>ran out and it stopped again.

You really need to meter the stuff into the carb as you are cranking
if you are trying to prove that it is a fuel feed fault, with one
person dripping it in you can adjust the mixture on the throttle.

Over do it and you need to dry the plugs off.

Once it's basically turning over under its own steam rapidly opening
the throttle should pump fuel from the richening pump (depending on
model and I stopped using a sIII 10 years ago) if there is fuel in the
float chamber, if you can keep it alive like this then it points to
blocked jets, if the throttle pump doesn't squirt fuel when its
depressed it points to a blocked float valve (assuming the fuel pump
on the side of the block gets fuel up to the carb.

AJH
 
On Sun, 17 Apr 2005 21:12:54 +0100, [email protected] wrote:

>On Sun, 17 Apr 2005 20:52:58 +0100, Tim Hobbs
><[email protected]> wrote:
>
>>
>>OK - tipped about half a pint of fuel down the carb. Much gurgling, so
>>it went somewhere. Left it a few minutes (pudding was ready!) and
>>then turned it over - lots of coughing and half-running, then the fuel
>>ran out and it stopped again.
>
>You really need to meter the stuff into the carb as you are cranking
>if you are trying to prove that it is a fuel feed fault, with one
>person dripping it in you can adjust the mixture on the throttle.
>
>Over do it and you need to dry the plugs off.
>
>Once it's basically turning over under its own steam rapidly opening
>the throttle should pump fuel from the richening pump (depending on
>model and I stopped using a sIII 10 years ago) if there is fuel in the
>float chamber, if you can keep it alive like this then it points to
>blocked jets, if the throttle pump doesn't squirt fuel when its
>depressed it points to a blocked float valve (assuming the fuel pump
>on the side of the block gets fuel up to the carb.
>
>AJH

I noticed the accelerator pump isn't working earlier, but forgot about
it until you just mentioned it. I'm going to have to investigate
further when daylight next coincides with free time!
--

Tim Hobbs

'58 Series 2 88" aka "Stig"
'77 101FC Ambulance aka "Burrt"
'03 Volvo V70
 
On or around Sun, 17 Apr 2005 21:12:54 +0100, [email protected]
enlightened us thusly:

>
>Once it's basically turning over under its own steam rapidly opening
>the throttle should pump fuel from the richening pump (depending on
>model and I stopped using a sIII 10 years ago) if there is fuel in the
>float chamber, if you can keep it alive like this then it points to
>blocked jets, if the throttle pump doesn't squirt fuel when its
>depressed it points to a blocked float valve (assuming the fuel pump
>on the side of the block gets fuel up to the carb.

stuck float valve gets my bet.

--
Austin Shackles. www.ddol-las.fsnet.co.uk my opinions are just that
"Ask yourself whether you are happy, and you cease to be so."
John Stuart Mill (1806 - 1873)
 
On Sun, 17 Apr 2005 22:13:33 +0100, Austin Shackles
<[email protected]> wrote:
>
>stuck float valve gets my bet.

Right, had the carb off and taken the top off it. Float chamber had a
bit of detritus in the bottom, but nothing spectacular. Cleaned it
up, rinsed it all out with petrol.

Gasket looked all in one piece, inlet blows through with float down,
doesn't blow with float up. All looks good.

Put it back together, with the float full of fuel. Refitted carb and
turned engine over. Hey presto!

Bugger all. Nothing, nada. Still no fuel getting to plugs as far as
I can see.

Just to recap - when I tip a glug of fuel in the carb the engine fires
straight off and runs for 20 seconds nice and smooth (albeit with a
lot of smoke as you'd expect). So the ignition side is OK (at least
good enough for it to run).

There's a good splurge of fuel coming through from the pump.

When I flap the throttle linkage about should I see a squirt of fuel
from the accelerator pump? I don't seem to be getting anything there.

Do I need to strip the carb down further? Has anyone had experience
of the Zenith rebuild kits that are on the market?


--

Tim Hobbs

'58 Series 2 88" aka "Stig"
'77 101FC Ambulance aka "Burrt"
'03 Volvo V70
 
On or around Fri, 22 Apr 2005 18:47:01 +0100, Tim Hobbs
<[email protected]> enlightened us thusly:

>
>Just to recap - when I tip a glug of fuel in the carb the engine fires
>straight off and runs for 20 seconds nice and smooth (albeit with a
>lot of smoke as you'd expect). So the ignition side is OK (at least
>good enough for it to run).

that's if you tip petrol down the inlet?

in that case, there's spooge blocking the bit twixt float chamber and main
jet, I reckon. Was there petrol in the float chamber when you opened it?


>
>There's a good splurge of fuel coming through from the pump.
>
>When I flap the throttle linkage about should I see a squirt of fuel
>from the accelerator pump? I don't seem to be getting anything there.

The above could cause that too. Float chamber outlet tends to be at the
bottom, and thus if it dries out, the spooge gravitates to the lowest point.

>Do I need to strip the carb down further? Has anyone had experience
>of the Zenith rebuild kits that are on the market?

'fraid so, from the sound of it. If you have an airline, put a small nozzle
on it and blow through an holes you can find.
--
Austin Shackles. www.ddol-las.fsnet.co.uk my opinions are just that
"Festina Lente" (Hasten slowly) Suetonius (c.70-c.140) Augustus, 25
 
On Fri, 22 Apr 2005 18:47:01 +0100, Tim Hobbs
<[email protected]> wrote:

>
>When I flap the throttle linkage about should I see a squirt of fuel
>from the accelerator pump? I don't seem to be getting anything there.

When you floor the accelerator you should be able to see the stream of
petrol in the carb intake.

AJH
 
>
>>Do I need to strip the carb down further? Has anyone had experience
>>of the Zenith rebuild kits that are on the market?
>
>'fraid so, from the sound of it. If you have an airline, put a small nozzle
>on it and blow through an holes you can find.

Sounds reasonable I suppose. I do have an airline so I'll give it a
go. I wonder if a squirt of WD40 with the little nozzly thing on it
would shift it?

On the plus side, there are any number of carbs on e-bay. I'd be
really chuffed to strip this and get it working, but it's more
important to get the bloody thing out of the garage so I can empty my
shed, so I can knock it down, so I can finish the patio, so I can move
the garden furniture off the drive so I've got room to fix the Land
Rover....




--

Tim Hobbs

'58 Series 2 88" aka "Stig"
'77 101FC Ambulance aka "Burrt"
'03 Volvo V70
 
I stripped down my Zenith earlier this year and replaced all bits with
Paddock's rebuild kit. Fairly straightforward job, even using HBOL for
instructions. I'm a complete novice and took a couple of hours going
really slowly and carefully.

Once you've cracked the whole carb in half you will be able to see any
blockages in the channels that run through the blocks fairly easily.

Beware, someone had obviously had a go at mine before and put some jets
in badly. The pump jet has to screw through 2 bits to get to its final
seating place and the threads were so badly knackered I couldn't get the
new one back in. If you meet any major resistance screwing out the old
jets, look carefully at that jet and decide if it really needs replacing.

Tim Hobbs wrote:
> On Sun, 17 Apr 2005 22:13:33 +0100, Austin Shackles
> <[email protected]> wrote:
>
>>stuck float valve gets my bet.
>
>
> Right, had the carb off and taken the top off it. Float chamber had a
> bit of detritus in the bottom, but nothing spectacular. Cleaned it
> up, rinsed it all out with petrol.
>
> Gasket looked all in one piece, inlet blows through with float down,
> doesn't blow with float up. All looks good.
>
> Put it back together, with the float full of fuel. Refitted carb and
> turned engine over. Hey presto!
>
> Bugger all. Nothing, nada. Still no fuel getting to plugs as far as
> I can see.
>
> Just to recap - when I tip a glug of fuel in the carb the engine fires
> straight off and runs for 20 seconds nice and smooth (albeit with a
> lot of smoke as you'd expect). So the ignition side is OK (at least
> good enough for it to run).
>
> There's a good splurge of fuel coming through from the pump.
>
> When I flap the throttle linkage about should I see a squirt of fuel
> from the accelerator pump? I don't seem to be getting anything there.
>
> Do I need to strip the carb down further? Has anyone had experience
> of the Zenith rebuild kits that are on the market?
>
>
 
On Sat, 23 Apr 2005 08:08:52 +0100, Dan Burdge
<[email protected]> wrote:

>I stripped down my Zenith earlier this year and replaced all bits with
>Paddock's rebuild kit. Fairly straightforward job, even using HBOL for
>instructions. I'm a complete novice and took a couple of hours going
>really slowly and carefully.
>
>Once you've cracked the whole carb in half you will be able to see any
>blockages in the channels that run through the blocks fairly easily.
>
>Beware, someone had obviously had a go at mine before and put some jets
>in badly. The pump jet has to screw through 2 bits to get to its final
>seating place and the threads were so badly knackered I couldn't get the
>new one back in. If you meet any major resistance screwing out the old
>jets, look carefully at that jet and decide if it really needs replacing.

Took it properly apart this afternoon and gave it a thorough seeing to
with the degreaser (just bought a Clark parts washer, which makes life
very easy).

It's obviously been apart before - some mangled heads and stuff, but
no obvious blockages. I imagined I felt resistance when I blew one
jet through, but wasn't sure. The taste of petrol may have been
getting to me by then...

Put it all back together and refitted it. It was immediately obvious
that the accelerator pump was getting something, as I could feel/hear
it. Turned the key and away he goes!

It's all got to come off again - I'm going to get the Burlen rebuild
kit for it and properly check the mating faces on the emulsion block
for warp. It runs like a bag of cack, as the carb to inlet gasket is
missing and the choke is similarly absent. But it runs....

Thanks guys for all your help. Austin - you were bloody right
again....
--

Tim Hobbs

'58 Series 2 88" aka "Stig"
'77 101FC Ambulance aka "Burrt"
'03 Volvo V70
 
On or around Sat, 23 Apr 2005 17:59:48 +0100, Tim Hobbs
<[email protected]> enlightened us thusly:

>On Sat, 23 Apr 2005 08:08:52 +0100, Dan Burdge
><[email protected]> wrote:
>
>
>
>Thanks guys for all your help. Austin - you were bloody right
>again....

BTDTGTTS, and it's got oilstains on it.

Had no end of hassle with the 110, when I first had it - twin-choke weber on
that, and the spooge in question had hid itself in a little hole at the
bottom of the float chamber, where it was almost invisible.
--
Austin Shackles. www.ddol-las.fsnet.co.uk my opinions are just that
"My centre is giving way, my right is in retreat; situation excellent.
I shall attack. - Marshal Foch (1851 - 1929)
 
You must log in or register to reply here.

Similar threads

T
OT - oh bugger, now look...
Replies
14
Views
1K
Tim Hobbs
T
T
removing 2.25 block without a crane....
2
Replies
31
Views
2K
EMB
E
T
OT - 3G
Replies
3
Views
528
Dave Liquorice
D
T
OT - who to vote for?
2
Replies
23
Views
2K
Karen Gallagher
K
T
weber carb
Replies
1
Views
820
Boris Kumpar
B
Back
Top