FSH 210 Sport
Jetboaters Admiral
- Messages
- 6,970
- Reaction score
- 8,345
- Points
- 482
- Location
- Tranquility Base
- Boat Make
- Yamaha
- Year
- 2020
- Boat Model
- FSH Sport
- Boat Length
- 21
I kind of figured it out, tracing the part:
View attachment 146292
If I only had access to parts fiche for my new Parker! I tell you, we 've been very spoiled with Yamaha boats, can find every part, nut and bolt in every model, in seconds.
As I understand it, the isolator lead simply prevents current from flowing from the house battery back to the motor just like a VSR does; since the F300 4.2 Yamaha alternator has independent outputs, like a VSR controls where the current goes.
I’m more used to having a DVSR or VSR but either can fail, and Yamaha in Parker does it right it seems: a great, simple, and robust system straight form the factory, and no need to complicate it with an extra combiner, if I understand it all correctly.
In most schematics I see aux charge lead as 'optional', so kudos to Parker, again, for including this!
EDIT:
this would be an (oversimplified) schematic that I think applies here:
View attachment 146293
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Can you explain why this is necessary? I thought alternators had diodes that prevented current from flowing in the non desirable direction?