Hunter 49/50 alternator wiring

Jan 4, 2019
57
Hunter 50 Halifax & Martinique
I had to take out my alternator to change the impeller, not having done the Boas Fix yet. When putting the alternator back on there was a grey wire with a male connection that I didn’t notice earlier. Does it connect to anything?
 

jviss

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Feb 5, 2004
7,089
Tartan 3800 20 Westport, MA
I had to take out my alternator to change the impeller, not having done the Boas Fix yet. When putting the alternator back on there was a grey wire with a male connection that I didn’t notice earlier. Does it connect to anything?
That's probably the field wire, and there should be a receptacle for it on the back of the alternator.
 
Jan 4, 2019
57
Hunter 50 Halifax & Martinique
The 4 wires that are attached to the alternator use a clip or a bolt to secure them. This grey wire has only a clip on connector that doesn’t seem to have a home.
 
Aug 18, 2018
143
Hunter 410 MDR
Are you're talking about the short wire with a receptacle attached thats on the alternater? I have that and it goes to nothing, I believe, but could be very wrong, that it's a ground wire, but our alternaters are already grounded to the engine. So not needed.
In my case that's how its always been working.
 
Feb 11, 2019
13
Hunter 29.5 Bristol, PA
I had to take out my alternator to change the impeller, not having done the Boas Fix yet. When putting the alternator back on there was a grey wire with a male connection that I didn’t notice earlier. Does it connect to anything?
Can I ask what the Boas Fix is?
 
Jan 4, 2019
57
Hunter 50 Halifax & Martinique
Art Boas posted a new water pump instal on front of the engine to replace the existing pump with the difficult to access impeller.
 
May 1, 2011
4,936
Pearson 37 Lusby MD
I can't find the file in downloads, but here's an old discussion:
 
Dec 15, 2019
158
Hunter 49 San Diego
I recently replaced the turbocharger on my 4jh4 HTE and stumbled onto a short cut you might be interested in for changing the impeller. Removing the three bolts and the two hose clamps on the exhaust manifold allows great access to the raw water pump. It is relatively easy to reach in and remove the bolts and impeller. I think it’s less hassle than removing the alternator. Turns out, the old turbo was fine as was the exhaust elbow, which I found out was bronze and bullet proof. I went ahead and replaced the turbo anyway since I had many hours invested in taking everything apart to gain access. I was also worried because I didn't hear a turbo whine when throttling up. I learned later that low pressure turbos don't always emit a distinct whine like high pressure turbos do. The new turbo sounds exactly like the old one. This information might be helpful for Hunter 49/50 owners with over 1000 hours on their engine who are contemplating replacing their turbocharger as scheduled maintenance.
 

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