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.
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?
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.?
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?
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
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
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.
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?
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
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.
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 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.
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
