Maker Pro
Maker Pro

Rev Counter on Diesel Engine

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Brian Runyard

Jan 1, 1970
0
I'm in the process of replacing the old AQ110 petrol engine (negative earth)
in my boat with a Perkins Diesel.
Is it possible to retain my original Rev Counter (signal from contact
breaker), but pickup the signal from the Alternator instead and recalibrate
the instrument (I have an accurate hand held tacho to compare it with)?

Regards,
Brian
http://homepage.ntlworld.com/brunyard.

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B

Brian Runyard

Jan 1, 1970
0
Larry

I don't have the Perkins tach, so before parting with hard earned cash I
wondered if I could modify what I've got.
The engine is a Perkins Prima 78hp Turbo, out of a car so I've got to spend
about £700 for the marinising kit.
Regards,
Brian
 
B

Brian Runyard

Jan 1, 1970
0
Larry

The engine plus a second for spares only cost 60UKP.
I experimented at the weekend, and have solved my problem.
1. Built a circuit that uses an optical sensor
2. Removed the circuit board from inside the tacho, so it's just a moving
coil meter.
3. Put 2 white blobs on the flywheel.
4. Calibrated the circuit.
Works wonderful.

Regards,
Brian
http://homepage.ntlworld.com/brunyard
 
B

BruceM

Jan 1, 1970
0
Yeah, until it gets oil or grease or something on it!
BruceM
 
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