- Jan 5, 2020
That one looks like the sealed one I used to have, I think it was $10 at the time, I use it to tune my saw. It's fairly accurate, the saw runs the best at 12,500 and pulls through the wood good. I would still have it, if I could have replaced the battery.https://www.amazon.com/Maintenance-...39d1e&pd_rd_wg=LiQjy&pd_rd_i=B07PMJH7QV&psc=1
I thought my first meter was defective, but now the replacement acts the same way. Did you experience this ? You can set these for 2 and 4 stroke engines with one or two cylinders depending on your application. Mine is 4 stroke one cylinder. It idles at 4200 rpm and I have seen it over 14,000 rpm at 2/3 throttle. I tried all three possible settings, closet being for a 4 stroke 4 cylinder or 2 stroke 2 cylinder. Without a real tach for reference I feel my idle is around 800 rpm and the tach shows 1150 rpm. I don't have enough hours on this yet to feel comfortable at W.O.T. checking the governor. I'm not sure what that rpm is on a HauSheng f142, do you ?
After riding for 20 minutes the hour meter shows 0.3 which seems to be right on. Maybe you can check the tach calibration by means of the hour meter ??
One thing that confuses me.......this device has a clock timer built in, obviously. To create a tach all you do is count the electrical pulses to the spark plug. The computer does the math. You need to tell it if it's 2 or 4 stroke so it can count correctly. Here's the question: why do the instructions ask "how many cylinders" ? It only triggers off one plug wire. It shouldn't matter if it was a V-8 because, hopefully, all the cylinders are operating at the same rpm. Anyway, I would like to hear about your experiences and how you resolved them. thank you
1150 sounds like a good idle for a motorized bike 4t, try turning you idle screw in and watch the tach and listen. You can return to your old idle setting at any time, just to check you device.