tonym3 Posted November 19, 2014 Share Posted November 19, 2014 hi all I have finally got my spitfire back from the paint shop and now the fun begins.So we managed to get it running before it went but that was nearly 8 months ago!! So got it back checked all the normal bits I have good spark battery is new and fully charged.If I squirt easy start directly in the carbs then turn it fires with the easy start then stops once it runs out.So I'm going for a fuel delivery problem I have fuel in the system and the fuel filter has fuel in it. If I undo the fuel line at the carb is flows.One thing I have not had much dealings with is the float chambers.Would someone be able to first explain (in nice simple terms!!) what they do and how they operate? I'm looking at them and guessing the fuel gets delivered to them then they feed the carbs. If they are not feeding the carbs where is the fuel going?Are am I missing something?ThanksTony Quote Link to comment Share on other sites More sharing options...
Dannyb Posted November 19, 2014 Share Posted November 19, 2014 Basically they hold an amount of fuel for each carb which is controlled by a plastic float and a valve. Just undo the three screws on top and take the top off. the float and valve come off with the top. It could be the valves are stuck after a long layup. Quote Link to comment Share on other sites More sharing options...
tonym3 Posted November 19, 2014 Author Share Posted November 19, 2014 Lovely thanks Danny Will be it be obvious if they are stuck and if so do I need to do anything to unstick or will the process of removing the top do this?Thanks again Quote Link to comment Share on other sites More sharing options...
WIMPUS Posted November 19, 2014 Share Posted November 19, 2014 Also check for dirt at the bottom, it can block the jet and then it will not have enough fuel or sometimes blocking (got that when i first started mine after nearly 2 years ! ) Quote Link to comment Share on other sites More sharing options...
tonym3 Posted November 19, 2014 Author Share Posted November 19, 2014 Ok so just removed the top and pulled out the float (big orange thing!) didn't notice anything else what does the valve look like? Am I checking for dirt and muck at the bottom on the inside or outside?Thanks Quote Link to comment Share on other sites More sharing options...
tonym3 Posted November 19, 2014 Author Share Posted November 19, 2014 Should add when I removed the top they both had lots of fuel in them Quote Link to comment Share on other sites More sharing options...
yorkshire_spam Posted November 19, 2014 Share Posted November 19, 2014 The valve is above the float in the lid.Have a look at Rimmers/Canleys parts diagrams.... they might give you some hints. Quote Link to comment Share on other sites More sharing options...
Mj17 Posted November 19, 2014 Share Posted November 19, 2014 If both float chambers had fuel in them it suggests blocks carb jets.Remove the air filters and dashpot covers and pump the choke a few times (just grab the cable and pull/push a few time). You should see fuel looking down the jet. If not try removing the carb jet from the carb/float chamber and giving it a good (and tasty if you don't have a compressor) blow through. Quote Link to comment Share on other sites More sharing options...
tonym3 Posted November 19, 2014 Author Share Posted November 19, 2014 Ok so removed the dash pots and pumped the clutch, no movement from inside the carb.So underneath the jet removal, bolt at one end so I have undone this how does it come off? Didn't want to pull too hard in case I brake something!! Quote Link to comment Share on other sites More sharing options...
lancepar Posted November 19, 2014 Share Posted November 19, 2014 Not the answer to your problem, but........In future, Instead of using easystart, put Petrol into an old clean hand pump atomizer like an windscreen de-icer and spray that into the carbs while the engine is turning. Then the engine can then be kept running longer by additional squirts.(clap)(After thought) You say you have checked all the normal bits, does this include the plug leads and the firing order, how about the ignition timing? 8) Quote Link to comment Share on other sites More sharing options...
tonym3 Posted November 19, 2014 Author Share Posted November 19, 2014 1704 wrote:Not the answer to your problem, but........In future, Instead of using easystart, put Petrol into an old clean hand pump atomizer like an windscreen de-icer and spray that into the carbs while the engine is turning. Then the engine can then be kept running longer by additional squirts.(clap)(After thought) You say you have checked all the normal bits, does this include the plug leads and the firing order, how about the ignition timing? 8)I nearly had it running just now turning and nearly catching I want to try cleaning the jets for two purposes.1: I have never done this and it's seems a easy enough check to add to my knowledge bank.2: it's makes sense that it could be the answer.In the Haynes manual it shows the nut at one end of the jet which I have undone but at the other end it shows a screw which mine does not have only way I can see to remove is using the adjusting screw. I would rather not do this as it was running as it's currently set up so don't want to mess with it.Am I right that the jet is on the bottom of the carb not the flexi pipe going from the carb to the float?Thanks for the hint by the way I will have to empty the wife's cleaning products first!! Quote Link to comment Share on other sites More sharing options...
DanM Posted November 19, 2014 Share Posted November 19, 2014 the jet and the flexi pipe is one unit. undo the flexi pipe from the float bowl then the jet will be held to the choke actuator by a screw or a clip, release whichever yours has and then the jet just drops down out of the carb Quote Link to comment Share on other sites More sharing options...
Mj17 Posted November 19, 2014 Share Posted November 19, 2014 Are the jet on your carbs just little red sticks of plastic or a mini metal candle holder?The former are the 'traditional' just and the latter Waxstat ones that reduce emissions/just cause problems. If you've taking the old ones off might be worth converting to standard jets. Quote Link to comment Share on other sites More sharing options...
tonym3 Posted November 19, 2014 Author Share Posted November 19, 2014 Ok it looks like it attaches to the choke via a clip so I will have a look at that.Good info about the type of jet I will have a check of that so if it's metal it's worth changing?Thanks Quote Link to comment Share on other sites More sharing options...
Dannyb Posted November 19, 2014 Share Posted November 19, 2014 Don't start changing anything before you get it running or you could introduce a problem before this ones sorted.If it was running 8 months ago then it's going to be something silly.Try some fresh petrol. Empty the old from the float bowls and pour some new in. then try starting it. Quote Link to comment Share on other sites More sharing options...
yorkshire_spam Posted November 19, 2014 Share Posted November 19, 2014 Where are you based Tony? Might be worth enlisting the help of a local club member just to put a second set of eyes on the problem? Quote Link to comment Share on other sites More sharing options...
tonym3 Posted November 19, 2014 Author Share Posted November 19, 2014 I'm in Brentwood Essex I had one of my friends coming over today who has always been into triumphs (currently has a lovely tr8) but he got caught up so couldn't make it. Had to leave everything today as the body shop needed me to pick up the rest of the bits, so I now have a complete car just need to bolt it all back together again!! I will try and get on it again this week in the evenings if not I am off again Sunday so will have a few hours on it then.Didn't manage to get the jet off today so will have another look later in the week when I get time.Thanks for all the help today I will get some pictures taken over the weekend and give an update on the rebuild Quote Link to comment Share on other sites More sharing options...
.thumb.jpeg.b15b81ef10abeea1c3039ae03c4a9f3a.jpeg)
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.