Shop Tach

markhodges78

Chief Petty Officer
Joined
Aug 4, 2016
Messages
416
What are you guys using as a shop Tech ? I have a Bosch's FIX 7529 Digital Advance Timing Light with Tach but it shows rpm at 1300 so I'm assuming I divide that by 2 and get 650 ? was hoping to get something to take the math out of it
 

markhodges78

Chief Petty Officer
Joined
Aug 4, 2016
Messages
416
What are you guys using as a shop Tech ? I have a Bosch's FIX 7529 Digital Advance Timing Light with Tach but it shows rpm at 1300 so I'm assuming I divide that by 2 and get 650 ? was hoping to get something to take the math out of it
Sorry Tach not Tech
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
Joined
Jul 23, 2011
Messages
49,538
I use a 60 year old tach that my father used in high-school. I also have a 50 year old tach that my wifes father used. I also have a laser tach that I use for small engines, etc.
 

dwco5051

Commander
Joined
Sep 14, 2008
Messages
2,410
What are you guys using as a shop Tech ? I have a Bosch's FIX 7529 Digital Advance Timing Light with Tach but it shows rpm at 1300 so I'm assuming I divide that by 2 and get 650 ? was hoping to get something to take the math out of it
What motor are you using it on? Some 2 cylinder two strokes (my Tohatsu is one) only have one Siamese coil and sparks both plug wires each revolution.
 

markhodges78

Chief Petty Officer
Joined
Aug 4, 2016
Messages
416
I believe my engine gets 2 pulse's ( fires twice ) per revolution. That's why the tach I have needs to be divided by 2. I know there are hand held tachs that have adjustments for this I was just checking to see if anyone had any experience with any of them..
 

stresspoint

Lieutenant Junior Grade
Joined
Sep 19, 2022
Messages
1,045
digital laser tach is my go to , i use it for everything , just buy a roll of reflective stick on when you first buy one.
 

markhodges78

Chief Petty Officer
Joined
Aug 4, 2016
Messages
416
digital laser tach is my go to , i use it for everything , just buy a roll of reflective stick on when you first buy one.
Any particular brand ? I see the one at harbor freight has good reviews. But I normally don't shop harbor freight for something like this
 
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