Rev Counter on Diesel Engine

[Brian Runyard]

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.

The Information contained in this E-Mail and any subsequent correspondence
is private and is intended solely for the intended recipient(s).
For those other than the recipient any disclosure, copying, distribution, or
any action taken or omitted to be taken in reliance on such information is
prohibited and may be unlawful.

 

[Brian Runyard]

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

 

[brian clode]

asap supplies in the uk sell Faria rev counters that use alternator
sensing,( I have two on twin diesels)
www.asap-supplies.com
good luck Brian

 

[Brian Runyard]

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

 

[BruceM]

Yeah, until it gets oil or grease or something on it!
BruceM