Two Stroke Spark Plug Tachometer?

JayTee · Aug 6, 2017

I'm interested in getting the best setting for my 'H' screw on my Stihl chainsaw, keeping within the 12,500 Max RPM limit for my saw.

Does anyone have a recommendation for an inexpensive, non-contact tachometer? I've seen them used in YouTube Videos; having no luck searching for anything that is non-laser/photo.

Thanks!

John

bertsmobile1 · Aug 6, 2017

inexpensive or works properly & reliabily.
One or the other but not both.
There are 3 units sold through my wholesalers which all come with 2 or 3 year warranty,
There are lots on the web for 1/4 the price with no warranty
Most mower shops either carry or will order in a good one that actually works
Most are around the $ 100 mark

JayTee · Aug 6, 2017

bertsmobile1 said:
inexpensive or works properly & reliabily.
One or the other but not both.
There are 3 units sold through my wholesalers which all come with 2 or 3 year warranty,
There are lots on the web for 1/4 the price with no warranty
Most mower shops either carry or will order in a good one that actually works
Most are around the $ 100 mark

Good Evening Bertsmobile1!

Aint that always the way! If I should go with proper and reliable, do you have recommendations?

How about wired, in line with the plug/wire? This will be one of those things that I use very infrequently, so it's hard to justify putting down a C-Note when I have SO many other toys I want! :smile:

John

bertsmobile1 · Aug 6, 2017

This is the only one I would recommend
https://www.jackssmallengines.com/jacks-parts-lookup/part/universal/751180
Oddly enough it does not have a brand name but every one of my wholesalers sell it with 12 months commercial warranty.
All the others are digital and near twice the price
There is the PET 1000and the Pulse 1000 which use the same chip set in different cases.
Both are a PIA for hand helds because they use induction pick ups and can be very hard to fit as plug leads are very short on hand helds.
Aslo being digital they are near impossible to read unless heavily damped.
Dial type are much easier to use as you can see the needle fluctuating .
Most specs are +/_ 300 to 500 rpm so pinpoint accuracy is not needed.

JayTee · Aug 7, 2017

Thanks for the recommendation. I'll have to put that on my wish list.

John

1 Lucky Texan · Aug 10, 2017

have you tried any acoustic tach apps for your phone?

also, I saw this on-line; https://www.hearth.com/talk/threads/free-chainsaw-tach.140730/

MowerMike · Aug 10, 2017

I've had good luck with the Fast-Tach that works with both two and four stroke engines.

https://www.tinytach.com/handheld-tachometers

JayTee · Aug 15, 2017

1 Lucky Texan said:
have you tried any acoustic tach apps for your phone?

also, I saw this on-line; https://www.hearth.com/talk/threads/free-chainsaw-tach.140730/

That is an idea that might suit my needs! I'm looking at doing this a couple of times a year. The 'right' tools would be really nice, but I just can't justify ~$100 for something I'll use a couple of times a year. I'm going to give this a shot in the meantime.

Thanks Lucky Texan!

John

JayTee · Aug 15, 2017

MowerMike said:
I've had good luck with the Fast-Tach that works with both two and four stroke engines.

https://www.tinytach.com/handheld-tachometers

Thanks MowerMike. That looks like one I've seen used in several YouTube Videos and will be something I'll aim for on down the line, especially if I keep fooling around with 2-strokes.

John

cpurvis · Aug 15, 2017

2 or 4 stroke shouldn't matter--they both fire every crank revolution.

Two Stroke Spark Plug Tachometer?

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