Kevin, you are ABSOLUTELY correct! I have used the exact same mathematical formulas as you were and find sooooo many mistakes in valve train maintenance as a whole. You can’t just go Willie Nillie in this area of the engine, this job, as any, needs to be done using proper technical procedures.
I'm curious, what are you after when performing this task? Advancing timing?If you wanted to ensure correct timing, you already got the engine out, pop the base gasket, and line up the timing marks. Put it back together and adjust your lifters. Seemed like a lot of effort for a unit that doesn't appear to have a timing chain. Great explanation though.
great video. I think a guy could lay the timing Marks out on tape. Just use 10 degree increments instead of marking out every single degree. It would still give you a close idea of where your at.
At 5:04 the pointer is at 0. At 5:08 it's mysteriously at about 30 ccw to 0. How did it get there? Just degree wheel moved? Or flywheel moved? Confusing? Is piston still against stop at that point.?
Hello, I am working with the Honda GX390 engine. I need to determine the valve timing, how can I do this or do you have this information? This is the information I mean; 1) Intake valve opening angle:? 2) Intake valve closing angle? 3) Exhaust valve opening angle? 4) Exhaust valve closing angle?
This is a great video, really explained things well, only issue i have, is i cant get my timing light to work. Can u tell me how u made ur connections? Did u use a battery, did u have to ground battery to the engine? I checked my timing light by hooking it up to my truck..it works fine, but I can't get it to work on a single cylinder engine...plz help
Well done great video just don't encourage power tools to fasten up anything into cast alloy casings. I had to helli coil my Triumph head because some workshop tosser did this and stripped my threads. It maybe ok for undoing fasteners but thats it.
I need help positioning a new coil. I have an old Nelson Brothers 1-1/2 hp engine and I would like to convert it to an electronic ignition. I'm going to remove the old flywheel, coils and points and install a new flywheel with OD magnet and electronic coil. I need help where to place the coil at piston TDC to get the timing spark correct. Thanks in advance for your help. JimRoy
I've got a large generator that was in good working order, but suddenly backfiring through the carb. The ignition timing is permanently set with no adjustment capabilities just like all small engines. The timing has changed to cause the spark plug to fire before the valve seats causing the backfire. Is there a way to adjust such a problem to correct the timing?
Man....I have a koler courage 17 on my zero turn. I bought it from a dead neighbor so I only knew it had 240 hours on an 07 model. Anyway, it didn't run so I changed all electrical components, all fuel lines, fuel pump, carb, fuses. Anything I could purchase....I changed it out. Anyway...it's hard to start but runs beautifully once I get it started, no stumbling, hesitation...nothing. I mowed literally 3 days ago and wanted to go do some mowing again today and it won't start. Could this be a timing issue?
To relieve the compression wouldn't it be easier to just remove the sparkplug and ground it to engine. Opening the motor and removing the valvetrain seems like a whole lot of way unnecessary work.
I still don’t get it: what exactly are we looking for with this timing stuff? I thought that the crank where the flywheel key attaches sets proper timing..? The key on the wheel is there to set up proper alignment. With that being said, why would all of this be necessary? Sorry I’m stupid on this
I have a GX390 this thing rips my finger every time I try to pull the start cord, I open the crankcase every dot on the gear mash perfect, I set the valve.0.15 in and 0.20 ex, steel kick back, any Idea?
This is a magnetic ignition. The magnet on the flywheel passes by the ignition coil. The magnet introduces an electric charge into the coil, which is basically just a step-up transformer. The high voltage is then sent to the spark plug to ignite
No cdi needed on small engines, Magnetic pulse coils just work by inducing an electromagnetic pulse that is sent directly through the high tension lead to the spark plug, as the flywheel rotates in sync with the crank it is one pulse per one revoloution on the engine. Simple stuff really. One rotation equals suck, squeese, bang, blow.......... .suck..fuel is drawn in through the inlet valve , squeese the air and fuel mixture in the cylinder as the piston drives back up to the top of the cylinder spark is then introduced at a precise moment an explosion is caused forcing gasses in the cylinder to expand at a massive rate forcing the piston back down introducing torque at the crank and as the cylinder reaches the bottom the exhaust side opens and expels the spent gas through the exhaust valve.
Fixed ignition timing in these small engines is more relevant to the fuel you are using than the type of racing. On most occasions you can advance a few degrees and still be able to run pump gas. In extreme situations, you can run with a fairly large advance if alcohol or race gas is your fuel.
If you were referring to camshaft timing, then that is another system of the engine and will be covered on a future video soon. There is a big misunderstanding on these types of small engines with confusion between the two.
I need help on wiring my honda 340 so it will fire it has a starter on it but no key it has blue green and wight and black wires I have sanded the stator and coil pulse the ground every thing tells me blue and green are ignishion wires but I'm guessing I need some help thanks
Kevin, you are ABSOLUTELY correct! I have used the exact same mathematical formulas as you were and find sooooo many mistakes in valve train maintenance as a whole. You can’t just go Willie Nillie in this area of the engine, this job, as any, needs to be done using proper technical procedures.
Excellent demonstration. The ending explanation of the degrees taught me something new. Thank you.
I'm curious, what are you after when performing this task? Advancing timing?If you wanted to ensure correct timing, you already got the engine out, pop the base gasket, and line up the timing marks. Put it back together and adjust your lifters. Seemed like a lot of effort for a unit that doesn't appear to have a timing chain. Great explanation though.
great video. I think a guy could lay the timing Marks out on tape. Just use 10 degree increments instead of marking out every single degree. It would still give you a close idea of where your at.
That’s the right way. That was the video I needed to refresh my memory. I was having a brain fart. lol. Thanks
At 5:04 the pointer is at 0. At 5:08 it's mysteriously at about 30 ccw to 0. How did it get there? Just degree wheel moved? Or flywheel moved? Confusing? Is piston still against stop at that point.?
Hello,
I am working with the Honda GX390 engine. I need to determine the valve timing, how can I do this or do you have this information? This is the information I mean;
1) Intake valve opening angle:?
2) Intake valve closing angle?
3) Exhaust valve opening angle?
4) Exhaust valve closing angle?
Does the spark plug fire when the trailing edge of the magnet passes the end of the 1st leg of the coil?
This is a great video, really explained things well, only issue i have, is i cant get my timing light to work. Can u tell me how u made ur connections? Did u use a battery, did u have to ground battery to the engine? I checked my timing light by hooking it up to my truck..it works fine, but I can't get it to work on a single cylinder engine...plz help
Well done great video just don't encourage power tools to fasten up anything into cast alloy casings.
I had to helli coil my Triumph head because some workshop tosser did this and stripped my threads.
It maybe ok for undoing fasteners but thats it.
Well said mate..... so many using impact guns to torque up...fu!@$% idiots.
I need help positioning a new coil. I have an old Nelson Brothers 1-1/2 hp engine and I would like to convert it to an electronic ignition. I'm going to remove the old flywheel, coils and points and install a new flywheel with OD magnet and electronic coil. I need help where to place the coil at piston TDC to get the timing spark correct. Thanks in advance for your help. JimRoy
You should sell a CD with the wheel. Thanks and be safe in this rough time
I've got a large generator that was in good working order, but suddenly backfiring through the carb. The ignition timing is permanently set with no adjustment capabilities just like all small engines. The timing has changed to cause the spark plug to fire before the valve seats causing the backfire. Is there a way to adjust such a problem to correct the timing?
If your ignition timing is permanently set then it would not change without a broken timing key. Check your valve lash in that case.
Can you do a video on changing the timing to 20 degrees?
What value is knowing the ignition timing if it can't be adjusted.
Do you have any videos on Troybilt Weed Eater adjusting the valves and the torques specifications? Thanks for the video. I just subscribed!
Ty for video
Seems with a threader it could in some cases catch a burr an drop shaving inside
You pack the threader with grease and all is well.
Man....I have a koler courage 17 on my zero turn. I bought it from a dead neighbor so I only knew it had 240 hours on an 07 model.
Anyway, it didn't run so I changed all electrical components, all fuel lines, fuel pump, carb, fuses. Anything I could purchase....I changed it out. Anyway...it's hard to start but runs beautifully once I get it started, no stumbling, hesitation...nothing.
I mowed literally 3 days ago and wanted to go do some mowing again today and it won't start. Could this be a timing issue?
One thing you didn't mention is that there are 2 tdc
one is compression and one is non compression
some people don't know that
Yep, the second is the exhaust stroke, and as you know, the exhaust valve will be opening.
kevin great video , would you do a video on adjusting the flywheel timing and can you do this with and without , a off set key
Yes, I will shortly. Now that winter is over I am cleaning out the shop and will upload more videos.
To relieve the compression wouldn't it be easier to just remove the sparkplug and ground it to engine.
Opening the motor and removing the valvetrain seems like a whole lot of way unnecessary work.
How do I set the timeing on a small engine 49cc 2stroke please help me thank u
I still don’t get it: what exactly are we looking for with this timing stuff? I thought that the crank where the flywheel key attaches sets proper timing..? The key on the wheel is there to set up proper alignment. With that being said, why would all of this be necessary? Sorry I’m stupid on this
sometimes the key on the cranks or fly wheels are a bit off could be advanced or retarded but the timing is never perfect
do you have a video on setting back lash?on a powerbuilt 500cc engine?
Valve lash?
@@smallenginemasters147 yes!
My bad, sorry. How do yo uh set the valve lash on a 500cc powerbuilt B&S engine.
no pick up or pulse coil??? how does that work
How did you know where make your mark on case
thankyou i finally understand this
great explanator👍👍👍
Just give me an idea, what to adjust flywheel or coil?
Nice vid, but it’s not necessary to do all that stroke finding, tdc is tdc no matter what stroke the engine is on.
why is this useful isn't the timing preset with the shaft key
I was wondering the same thing...?
I was wondering that too
It's not useful unless you are questioning the timing or want to set your own timing without the key.
I have a GX390 this thing rips my finger every time I try to pull the start cord, I open the crankcase every dot on the gear mash perfect, I set the valve.0.15 in and 0.20 ex, steel kick back, any Idea?
I guess the compression release isn't working
Check the flywheel key, probably partially sheared.
proper bloke
Good work here
Nice. Very well done.
does it have a cdi even??what type of ignition is it...please tell qhich engine is it
This is a magnetic ignition. The magnet on the flywheel passes by the ignition coil. The magnet introduces an electric charge into the coil, which is basically just a step-up transformer. The high voltage is then sent to the spark plug to ignite
No cdi needed on small engines, Magnetic pulse coils just work by inducing an electromagnetic pulse that is sent directly through the high tension lead to the spark plug, as the flywheel rotates in sync with the crank it is one pulse per one revoloution on the engine. Simple stuff really. One rotation equals suck, squeese, bang, blow.......... .suck..fuel is drawn in through the inlet valve , squeese the air and fuel mixture in the cylinder as the piston drives back up to the top of the cylinder spark is then introduced at a precise moment an explosion is caused forcing gasses in the cylinder to expand at a massive rate forcing the piston back down introducing torque at the crank and as the cylinder reaches the bottom the exhaust side opens and expels the spent gas through the exhaust valve.
Which better timing for drag race? Stock timing or advance timing?
Fixed ignition timing in these small engines is more relevant to the fuel you are using than the type of racing. On most occasions you can advance a few degrees and still be able to run pump gas. In extreme situations, you can run with a fairly large advance if alcohol or race gas is your fuel.
If you were referring to camshaft timing, then that is another system of the engine and will be covered on a future video soon. There is a big misunderstanding on these types of small engines with confusion between the two.
bro...please tell me how the length of reluctors on flywheel rotors are calculated??
Why isn't there's more videos on the channel🤔
More on the way with actual dyno testing.
My 45 year old 3.5 hp Tecumseh has the magnets on the inside the flywheel. What ya gonna do about that?
Digital caliper, not digital dial calipers.
Good
❤
How do I make my 13 hp honda get fire to the spark plug
I have new coil an I have reset the air gap multiple times new spark plug still no fire thanks in advance
@@johntodd7318Try disconnecting the kill switch and low oil level switch and see if it gets spark.
I did not understand : I wish of there is animation Video explains i to us
Portable Engine not Small engine
Portable engines are small.
I need help on wiring my honda 340 so it will fire it has a starter on it but no key it has blue green and wight and black wires I have sanded the stator and coil pulse the ground every thing tells me blue and green are ignishion wires but I'm guessing I need some help thanks
@@smallenginemasters147 LOL, yep. All that good info from the vid, and that is what he/she got out of it? LOL
@@brendagreen6715 Did you figure it out?