I have a '85 Catalina 30 with a Universal M25. Tachometer is not working and looks like Ammeter is not either. Checked alternator output voltage and it reads only .18 volts. I am assuming it should be 1-2 volts, but am not sure. If I in fact am only reading .18 volts of output, is that why tachometer does not indicate any RPM? John.
Tachometer / Alternator
- Thread starter LiederJ
- Start date
John,
The first thing to check are the wires at the back of the alternator.
The second, and more important thing, is to replace that ammeter. You remain one of a handful of skippers who may not be aware of the poor charging system with an ammeter in the cockpit.
Engine harness upgrade: A comprehensive overview by Gerry Douglas Important WARNING for M25 owners
You might also be interested in the threads related to the wiring harness in this C34 Critical Upgrades, many of which apply to your boat and engine. Also check your alternator bracket.
Critical Upgrades http://c34.org/bbs/index.php/topic,5078.0.html
There's also this:
Engines 101 - The BIGGEST & BEST collection of M25 Series Universal Engine Information on the Internet, plus some M35, too
http://www.c34.org/wiki/index.php?title=Diesel_Engine
The first thing to check are the wires at the back of the alternator.
The second, and more important thing, is to replace that ammeter. You remain one of a handful of skippers who may not be aware of the poor charging system with an ammeter in the cockpit.
Engine harness upgrade: A comprehensive overview by Gerry Douglas Important WARNING for M25 owners
You might also be interested in the threads related to the wiring harness in this C34 Critical Upgrades, many of which apply to your boat and engine. Also check your alternator bracket.
Critical Upgrades http://c34.org/bbs/index.php/topic,5078.0.html
There's also this:
Engines 101 - The BIGGEST & BEST collection of M25 Series Universal Engine Information on the Internet, plus some M35, too
http://www.c34.org/wiki/index.php?title=Diesel_Engine