new alternator ?

[stanley111]

I think it is time for a new alternator on both engines , boat is a 2000 28' with cummins 250's anyone been down this road ? should I replace with cummins or delco , big price difference .

[Nutz]

What is happening to make you think an alternator is going bad? I thought I was in need of a new alternator as my stbd one keep running up to 16 volts and fluctuating. It turned out to be a corroded connection on the three blade connector to the alternator. Cleaned the connection and it is now working normally.

[Armageddon]

Alternators don't just go bad on you over time. It's a waste of money and time if you ask me. Go buy another stand-up or re-spool your reels with spectra.

I can give you some more ideas if you want. My engines are '99. My mechanic would not reccommend changing a thing unless it's broke .....

[stanley111]

here is scenario , fished the cigar a few weeks ago , trolling as normal around noon starboard engine shuts down , restart , same thing 4/5 times then no start , push red breaker on block , starts up throttle to over 1000 rpms and everything okay , turn the boat and head in , runs fine for 3 hours, since then have taken short runs with no problem . open for suggestions !

[Tswann]

Alternators

You need to replace the breaker on the block NOT the alternator(s). That breaker does go bad from time to time from heat/age/vibration on the 4Bs. Feel free to give me a call if you need guidance on what part to get . . .

[stanley111]

thank you i will call , that's a big help

[tycharle964]

given the cold weather, you may want to disable the air heaters on the 4b's as well...they put quite a strain on the alternators