|
Alternator Fused?
Working out the details on a few big items.
Charging System: I'm taking a 4awg wire from my alternator (1 wire 105 amp) to positive of battery. Do I need / want this to be fused? Maybe something like this? Trim and Drive Pumps: Not sure what gauge wire yet? Probably just go with 4awg again? It his pretty big. Same question on the fuse. Thanks. |
Originally Posted by ttrm007
(Post 4660581)
Working out the details on a few big items.
Charging System: I'm taking a 4awg wire from my alternator (1 wire 105 amp) to positive of battery. Do I need / want this to be fused? Maybe something like this? https://www.amazon.com/dp/B015ABMN6C..._t2_B06XW27WMD Trim and Drive Pumps: Not sure what gauge wire yet? Probably just go with 4awg again? It his pretty big. Same question on the fuse. Thanks. https://www.westmarine.com/buy/blue-...5?recordNum=44 |
Mercruiser uses this mounted on the starter, and yes you need one. My DB Electric alternator shorted and the starter and ground lugs immediately started to smoke (the previous owner removed the fuse). Had I not been right there the whole boat could’ve been a toasty puddle of burnt ash. It’s barely rated above your 105a unit so it may not be enough. https://www.boats.net/product/mercur...saAuajEALw_wcB |
why are taking the output from the alternator direct to the battery, typically it goes to the starter + terminal where the battery hooks up, OE mercury wiring its orange
|
On a side note, 105a seems like a lot and requires heavier wires all around. I’m running three batteries with 85a and installing a charging isolator to ease the load a bit. |
Originally Posted by F-2 Speedy
(Post 4660609)
why are taking the output from the alternator direct to the battery, typically it goes to the starter + terminal where the battery hooks up, OE mercury wiring its orange
Thanks! |
| All times are GMT -5. The time now is 09:18 PM. |
Copyright © 2026 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.
