The stock alternator
can only pump out 51AMPS. I needed more power so I
installed the largest marine alternator I could
find. 150 AMPS is overkill but I was thinking of
the future when I bought it.
I purchased the new
alternator from Battery Shack for $400. They were exceptionally
helpful and answered all my questions. The
installation was extremely easy except for the
circuit breaker. It's buried in the back of the
engine so it took time to install and properly
wire the new 150 AMP breaker.
Stock alternator (51 AMP).
New 150 AMP alternator.
Installing a High
Output alternator:
Step
1 Disconnect the batteries from the boat.
Step
2 Remove 3 wires from rear of stock alternator:
orange (power output)
black (ground)
purple (exciter)
Step
3 Remove the stock alternator by
unscrewing the 2 bolts.
Step
4 Place the new alternator in position and
screw in the 2 bolts
Note:
I recommend replacing the 2 mounting bolts
with new ones.
click
for larger pic
Step
5 Installing the .5" serpentine belt
is extremely easy because it's self
adjusting. HELL YA! Use your foot and step
on the adjustment ball. Slide the belt on. No adjustment needed.
click
for larger pic
Step
6
Remove the rear panel that holds the circuit
breaker. Disconnect all necessary components.
click for
larger pic
Step
7
Remove the old 51 AMP circuit breaker and
replace it with a 150 AMP circuit breaker. I
mounted the new circuit breaker over the old
one.
Install the read panel.
Step 8
Use my wire diagram to complete the install. The
new alternator only needs the power supply wire.
The unit is self grounding and has an internal
voltage regulator.
Reconnect the batteries and test the new system. I
get about 14.2 at idle.
Note: I removed the orange wire but kept the
black and purple. This is for fallback reasons so
I can pop in my old alternator if I have
problems.
