Jamie sawyer

Agreed but I've an engine here that I can't sell on as it's not running. It's dead money in the water IMHO I have to do something and the obvious seems to be ignition Andrew. It has fuel through all the tests I've been advised to do which I've done. I've also checked all timing and adjusted trying different things. I spent nearly my whole Saturday trying it all and adjusting things to advice 👍 All advice appreciated

Forgive me if I speak out of turn here but is everyone reading the whole thread. I'm going to buy a new ignition unit once I speak to just engines today. Reason is because some have said even though it's sparking at atmospheric pressure while in compression it may not spark. 👍 It's getting fuel obviously from the tests I'm doing

Well I remember using a 4.8volt battery on it initially and that would be around the time I got a one and only pop out of the engine. I did put a 6volt battery onto it but it is rated to be able to take over 6volts so I'd assume it's ok. I'm going to order a new ignition box for it tomorrow. I tried the few drops of fuel in and it's just not working. It must be the ignition system that's failing. Flipping thing lol. I'll update once new box comes everyone thanks Edited By Steve Hargreaves - Moderator on 17/07/2017 19:24:15

Magnet is there and also when it reaches TDC it's on the magnet 👍

Ok I just tried it. 6v battery on ignition and plug out. I did get some fuel out of the exhaust port and shakes hell out of engine to make sure all fuel was out. Turned it over a few times to make sure it was dry. Put it back on mount and teaspoon roughly of fuel in plug port. Checked for spark and there was. Put plug back in and turned it over for 30 seconds with no take on the engine at all. I then put more fuel in carb port. Roughly a teaspoon worth again and 30 seconds on electric starter NOTHING NOT EVEN A POP I suppose it's but a new ignition box then chaps

Ps. I'll use a 6v nihm battery this time also

Thank you all for your advice. Very greatful of the knowledge you guys have on the subject. I will try drying it out and a small amount of fuel into the carb port. I'll keep choke off and have fuel tank disconnected. Just as reference how much fuel should I try first in port. Maybe a teaspoon full and see if I get a pop from the engine. Thanks again 👍

If the tank is emptying and spraying all over the bench surely it's coming through the piston port Steve ? I took the head off and the piston was coated in fuel. I couldn't actually see fuel on the head or plug though. I'd say I put 300 ml through it today trying to start it. I think you may be onto something on the compression thing though. I should be feeling more resistance I'd have thought!! I at one point poured a teaspoon of fuel into the plug hole direct and there was no additional resistance could the piston ring be goosed Steve ?

Just to add fuel is definitely going through as the bench was saturated with fuel. When I put electric starter on prop it was spraying from exhaust port. I tried it as 1/2 open on needle and progressively opened doing 30 second bursts on electric starter opening idle screw up each time a 1/4 turn. It still didn't fire. Recommend screw setting is 2 full turns open

I took manifold apart today and the Diapghram is fine and soft. No blockages. I've ordered fuel tube as it's glow tube on it just now which is wrong. I've also ordered a proper mixing container for getting oil to fuel ratio 100% correct. 33-1 is the ratio which I'm unsure if I've mixed accurate enough not to cause issues. Compression wise today I'd say that there wasn't as much compression as I'd expect especially if I was flooding the engine at times. I'd have expected hydronic lock to a degree but the compression was the same all the way through

Hi Jon, the engine should at least fire with a few drops of fuel in it shouldn't it ? I've tried that also and nothing. I'll try it again as you've described. There is a low end needle and a high end. Should I shut both off completely? And keep choke on or off

Hi Cymaz, I stripped carb this morning and no debri at all. I did wonder if it was choked also. I'm giving up for today. I think I might just send it to just engines to try. I've literally turned over every rock trying to start it. I even resulted in taking head off and warning it up inside with a blow torch to see if the hot engine would help with vaporisation of the fuel. Nothing has worked. It's my first petrol and think it could be my last lol I've dealt with engines for 20+ years and never had an issue tuning or even starting like this. It's almost like there's a failure internally of the engine

hi everone. Long time since I posted. I've an NGH 17 petrol engine. I'm having serious issues getting it to go. It's never run since I bought it 18 months ago. I've set it as per instruction manual no fire from it Fuel is fine and new fuel Using an electric starter and still not even a fire from it The ignition system spark is working 100% fine Can I try it on glow fuel with a glow plug in it ? Rather than petrol to see if it goes ? I've tried every conceivable setting on the fuel mixture screws to adjust fuel supply and no luck what so ever on it going. When it was brand new it popped only once on flicking the prop but not since. Lost on this engine now. It's getting plenty fuel as it's coming from the exhaust port and soaking the bench

Just a thought but would it be worth my while to take the plug out and drip a small amount of fuel direct onto the piston through the plug port just to be sure the fuel is getting in ?? Its just a thought

Hi everyone. the voltage regulator arrived this morning and I wired it up with my 3s 1p and have the engine a whirl for 2 minutes on the electric starter. I didn't spend very long in fairness trying but for the short period that I did try there was no fire from the engine. I'll have a go again tomorrow in the daylight. Is there any other possibility that could cause a petrol not to take ??

Thanks AVC, my mistake its 4.8 volts. I thought I had best ask in case I was missing something. The voltage regulator is ordered so I will report back when it arrives but I'm sadly not convinced

Ok thanks guys, with regards to John Stone. Wouldn't a 6.6 volt battery unregulated damage the electronics ? It states max voltage of 4.4 volts ?

I just ordered one of these so I will try my Lipo as power when it arrives and hopefully that will be it, god willing !! http://www.ebay.co.uk/itm/Etronix-4-8V-Voltage-Regulator-5A-ET0555-/252126365826?_trksid=p2141725.m3641.l6368

Thanks Martin just checking

Hi GrahamC I have done that also. I manually fed fuel into carb as it was as you say very sluggish to draw fuel from the tank at first. It's not now and as soon as I give the electric starter a buzz on the spinner you can see the fuel flow at speed up the fuel tube. On the engine there is a short tube that comes out of the carb and into the engine and it is definitely dry of fuel. Is this normal as I would have thought I should have seen fuel in it also ??

I have fresh fuel straight from fuel station last week

The spark plug is most definitely getting power as when I turn the prop with plug out it is sparking with a click noise to it. I will order a voltage regulator if it will help ... any suggestions as to where ? I just want this thing running or I will need to return it to Hobby King

What if I try fully charging the battery again AVC ?? I have 3s 1p lipos here .. 3 of them to be precise. Would that do with a volt regulator installed ? Thanks

Evening gents, I have bought the engine above. I have adhered to the instruction and mixed a 25/1 petrol oil mix. I have tried everything in my eyes to start this engine and not even a pop. Well there was at the very start but it certainly didn't take.. it was just a fire pop about 2 or 3 times and after that it just hasn't done it since. I have even bought an electric starter to try and get it going but not even a fire from it while trying this. I have always flown glow and was very excited about the prospects of a petrol but I am some what disheartened slightly. The spark plug is getting a spark. Fuel is getting to the carb. I have the low needle at 2 turns and high end needle at 2 turns as per instruction ..... There is 100% fuel getting to the carb....and a spark... I just don't understand how it is not taking. Running an 1100 mah 4 cell pack as ignition with a battery monitor installed so the battery is not the issue either. PLEASE HELP any suggestions are welcome please Jamie

Thanks Bob so I assume I don't need to use it. That's a handy wee Tacho. Might need to get that