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Webster IC Engine build log.
raynerd:
Hi Jason, Yes, I hope a video comes soon but my excitement has calmed a little with no further progress in the hour or so I`ve had free this evening.
I wasn`t going to post anything again until I had troubleshooted and got it running well but there seems to be a trend appearing and before I go fiddling, I was wondering if it suggested anything?
When I posted earlier I had just nipped down to the workshop to give it a go before tea. It run quite early on in the session and then progressively got worse. I`ve since been down to the workshop twice this evening, both times the engine kicked up and gave me a good little run of 20 ish cycles (OK, not a run but it clearly kicked in and started!), start up again a few coughs and tried to run a few cycles. Kick it up again and nothing but dead infrequent pops. I`ve just gone down now again before bed (wife is saying I`m obsessed) and exactly the same trend - run for a good 10-20 seconds, second attempt tried to run a few cycles at a time and then since then just pops and coughs.
I`m just curious trying to think what it could be. Other than leaving it for an hour there doesn`t seem to be anything I can do to get it to run again! I thought I was flooding the engine but I just dried the spark plug and it wasn`t really wet.
My only other thought is a worrying one! I`m leaving the petrol tank connected to the engine whilest it is sitting. Could the fuel vapour possibly be moving up the line while it is sitting so when I initially come to the engine it is running on the fuel evaporated up the line or does a few turns of the crank clear the line anway? I`m still concerned the intake valve isn`t working OK but then again, if it wasn`t working I would be getting any firing like I can hear.
Madjack, I`ve tried your method of lighter gas and I get a few more pops but it doesn`t seem to kick it in to any more life :(
Hummm puzzling.
dbvandy:
you are the test bed for this ignition, so I am leaning that way... are you by chance using rechargeable batteries? They are only 1.2 volt, so it you have 3 of them its only 3.6v WAY not enough to recharge the caps in the ignition module. 4 is still only 4.8 v... still probably a bit light.. 4 fresh AA's will give you 6v which is right where it should be from what I have found on the internet...
Don't make big adjustments right now... you are really close and all the valves and mechanicals are good enough to run.
Might want to try a little squirt of wd-40 in the cylinder every once and a while to keep the oring lubed.
I keep fuel in my tank for weeks on the Otto and the Webster and I can pull them off the mantle and one pull they will start right up, so I would not worry about that...
Maybe try some real gas sometime.. far more volatile, so be careful. I have found camping fuel works the best and does not sting NEARLY as bad.
Congrats on getting it to fire... now to get it to puuuurrrrrrrrrrrrrrrr
Doug
sbwhart:
--- Quote ---I`ve just gone down now again before bed (wife is saying I`m obsessed)
--- End quote ---
Yes I get that, don't know why :scratch:,
Perhaps they'd understand if they had a shed.
:lol:
Good luck you,re nearly their, my record for getting an engine running is 3 weeks, so you've only another 2 weeks to go :lol:
On a helpful note I seem to remember someone having similar problems with a vapor carb they put the problem down to the heat from the initial run effecting the vapor, fixed it by extending the length position of the input pipe, perhaps some of you more experienced IC guys can remember this and comment.
Stew
Stilldrillin:
I'm rooting for you Chris. :thumbup:
So near....... :D
David D
raynerd:
--- Quote from: sbwhart on May 08, 2011, 02:03:16 AM ---
--- Quote ---I`ve just gone down now again before bed (wife is saying I`m obsessed)
--- End quote ---
Yes I get that, don't know why :scratch:,
Perhaps they'd understand if they had a shed.
--- End quote ---
Scary thing is Stew, I honestly woke up at 6am with a bad dream that someone had stolen my workshop and a second dream that someone had fixed my engine - honestly!! I then went into my workshop from 6am to 7am obsessing about the engine again - no luck. I`ve got it bad - :proj: :proj:
Only just read all your replies, Stew I`ll try a longer tube from the vapour carb and see how it goes. I`m pleased that if you have taken 3 weeks getting an engine running, then I feel better now. If it was dead as a doornail I`d be worried but the fact that it has run means that something must be right.
Doug, I really do appreciate all the comments your making, your helping a lot. I`ve only just got your message regarding not making too many changes and must admit that I`ve dismantled the valve block this morning to clean it. I was worried it had oil on the valves like madjack mentioned.
Stilldrilling - thanks for the message. Fingers are crossed.
I`ve looked at a few Webster videos on youtube and there seems a little less friction on the cylinder than mine. Infact one one (I think Longboys) he spins it with his hand to start it and it fails to kick up on the first time but it does several revolutions on its own. There is a little too much friction on the piston with mine and also the compression on the "compression stroke" would also stop this from happening. I thought this was a good thing though tbh!
Chris
... like Stew said, with his 3 week record, I have another 2 weeks before I totally dispair!
Chris
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