Mercruiser 470 voltage regulator smoking

[rrick]

I recently bought an old boat with a 470. The first sea trial was great. No issues at all. The next day, I took it out, and after about 10 minutes, there was electrical smoke bellowing from under the engine cover. I turned off the engine and main battery switch, and it stopped. When I turned the battery back on, I could see that the sorce of the smoke was a terminal on the liquid cooled voltage regulator. (Yellow and orange wire) Does anyone know what can cause this? Is it fixable? Can anyone recommend a good alternator conversion kit available in Canada?

 

[kenny nunez]

Sierra Marine # 18-5953-1. This kit replaces the charging system with a 1 wire Delco alternator. Comes with all needed hardware. Easy to install no special tools needed.
If the starter on your engine has a solenoid mounted on the starter you will also need Sierra # 18-8220 fuse kit.
If the starter has no solenoid then the fuse is not needed.
You do not even want to repair that charging system, the parts are expensive.

 

[Bt Doctur]

There is a great kit sold on ebay, installed a few . this is the low mount one but I have installed high mount no power steering ones too

NEW 100 AMP MERCRUISER ALTERNATOR KIT 488 470 170 165 POWER STEERING ONLY | eBay

FREE ONE YEAR WARRANTY ! ONE YEAR WARRANTY.

www.ebay.com

3.7 NON PS NEW 100 AMP MERCRUISER ALTERNATOR CONV KIT 165-170-180-190-470-488 | eBay

(FREE ONE YEAR WARRANTY ! THIS KIT WILL KEEP ALTERNATOR BELOW TOP OF VALVE COVER RESULTING IN ZERO CLEARANCE ISSUES. VIEW ALL PICTURES ).

www.ebay.com

 

[Dubed]

Call Kevin @ Breezeworks in Florida. He has nice kits available for a reasonable price

 

[nola mike]

Sierra Marine # 18-5953-1. This kit replaces the charging system with a 1 wire Delco alternator. Comes with all needed hardware. Easy to install no special tools needed.
If the starter on your engine has a solenoid mounted on the starter you will also need Sierra # 18-8220 fuse kit.
If the starter has no solenoid then the fuse is not needed.
You do not even want to repair that charging system, the parts are expensive.

Whoa, $750! That's crazy for a $100 alt and a bracket. I think I paid less than ½ from breezeworks .

 

[Dubed]

Whoa, $750! That's crazy for a $100 alt and a bracket. I think I paid less than ½ from breezeworks .

Yup. I just bought one this year, still under $400

 

[Scott Danforth]

I have access to a laser, a lathe, and a pile of alternators.

I wouldn't pay more than $300-$350

 

[Bt Doctur]

If you go with Breezeworks, remember to center the pully on the balancer.
The link i posted uses the oem balancer and pully groove

 

[ROY WILLIAMS]

my MCM470 year 1978 . the voltage regulator is worn out is done ... the stator of the front engine is the stator coils . the 2 wires yellow/red the stator coils take it off the wires ... the red wire take it off voltage regulator , and the alternator updated it off the alternator output voltage red wire . the excitation of the alternator ignition terminal , wire engine key .

over 20yrs ago ... the voltage regulator stator done ...alternator LESTER 12174 great ..
my boat is now today 2023 ...very good .

 

[Dubed]

If you go with Breezeworks, remember to center the pully on the balancer.
The link i posted uses the oem balancer and pully groove

The kit I bought from Breezeworks also uses the OEM balancer. They also have a high mount and a low mount kit. I think it was around $345., but dont remember