Jump to content

Welcome to TheMalibuCrew!

As a guest, you are welcome to poke around and view the majority of the content that we have to offer, but in order to post, search, contact members, and get full use out of the website you will need to Register for an Account. It's free and it's easy, so don't hesitate to join the TheMalibuCrew Family today!

Voltage High Warning

Recommended Posts


I have a 2016 22 VLX, and this past weekend, I started getting a high-voltage warning. (I'll see if I can find the code again.) When the boat is idle, the voltage is fine, but with the throttle engaged, it starts to creep up to around 17.8v on the dash. This happens when on one or both batteries. 

After doing quite a bit of searching, it seems like it's either a bad ground or, most likely, the voltage regulator in the alternator. 

That being said, how hard is it to replace the alternator? Most mechanics in my area are about three weeks out before they can look at it, and it may take an additional week to get the parts. 

Headed out to the boat today with my multimeter to see if I can find the issue. 

Any help is appreciated. 

Link to comment

Have never swapped alternator; however, suspect it's pretty straightforward. With something like that, you wouldn't need a marine mechanic to do the work (i.e. you could have an auto mechanic tackle if you knew one that was more available).

Link to comment

I've swapped some auto alternators in the past, so I'm assuming this is straight forward. But, I don't want to assume too much. 

Link to comment

Yep, pretty easy with good access to it. If you’ve done an automotive one, you’ll be fine. I want to say you should have your current one rebuilt. I think I remember hearing people having a hard time finding a new one. Also, extremely important if you do replace, use a marine one. 

Edited by BlindSquirrel
  • Like 1
Link to comment

I was able to get the alternator changed, but I had a very hard time getting the belt back on by myself. I wound up letting the shop put the belt back on. 

My mechanic and I agreed that maybe taking the raw water pump off would have made getting the belt back on easier. 

I need to find a guide to taking the pump off, so i can replace the belt later this year. 

Link to comment

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...