20 October 2015

Whaler Resto pt xv - yamaha 90

Another whaler post so quick?
Over the weekend,
the wife and kids were gone.
The perfect selfish time.
boston whaler 16/17 with yamaha 90 hp 2-stroke
The Johnson/Evinrude to Yamaha swap started easily,
as both share the same OMC mounting hole placement,
as well as control cable positioning,
although with different ends.
Reminded me of the ford flathead and SBC.
1988 yamaha 90 hp on transom extension bracket
But anyone that's done repowers
will know there is always a catch.
There should be!
The marine business is all about spending money
and time figuring all this stuff out!
Learn it or go support your local boat mechanic!
1988 yamaha 2-stroke 90 hp
The main piece to the puzzle 
was the wiring harness.
Ya already know it's not going to match up.
yamaha vs OMC/Johnson/Evinrude wiring harness plug
eBay helped to score a perfect donor.
So nice I found it hard to cut it to length!
No problem
 It's only ten wires...
Really it's ID'ing 30,
as the yamaha color coding 
didn't match the Johnson color coding,
which didn't match the console wiring colors...
No problem,
didn't even need a wiring diagram.
This color translator better be correct!
On my back for an hour or two,
due to the great positioning of the console.
Who designed this thing?
custom boston whaler 16/17 console with Morse controls
And why didn't they make a trim switch?
At the time I couldn't imagine being so lucky!
The far right switch was commandeered for the task.
Now 5 switches are actually hooked up!
A little overkill,
but each will have a purpose...
first time with electric/hydraulic tilt
By Saturday evening the engine bumped over,
and wow the electric/hydraulic tilt worked.
Loved to hear that pump whine!
It was the perfect night to go for a cruise...
temporary idiot light
Nope still wasn't 100% finished.
The Evinrude transition outboard 
could have been saved with an idiot light
or warning buzzer.
Typically it's in the control box,
but remember who designed this?
A junk pile light was rigged up temporary permanent style,
no way I'm gonna burn this engine up
without a fight!
One thing I had made a while back
was this splash pan.
The extension bracket makes a 12" gap,
and water would occassionally bounce back
off the outboard.
Boston Whaler 16/17 transom extension bracket
The piece doubles as a handy workbench.
The last task was changing the fuel fitting,
the Yamaha is a little bigger.
4 pm on a Sunday...
Finally splash time!
The engine has the VRO 2-stroke oil reservoir,
so there's no premix fuel.
(Another reason for the idiot light)
To be on the safe side,
and since this was the first start in a while,
I ran the mix fuel tank and let it idle.
A bit heavier in the stern.
I'll have to reposition the battery and tanks 
for better balance.
Definite difference from 50 to 90 hp!
The big stainless prop has much more kick,
even just engaging gears.
Out in the bay,
the engine wanted to run.
20 mph was an easy cruise,
25 mph seemed about 2/3 throttle,
and I maxed out at 30 with room to spare.
No reason to push it on the first go.
There's still some adjusting to do.
I had moved the trim rod out there
but may experiment by raising up a notch.
At the launch ramp I tested the 4 hp kicker.
Boston Whaler 16/17 with Yamaha 90 & 4 hp outboards
Much more bite than the Johnson,
probably cause the longer shaft length.
Boston Whaler with Yamaha 90 hp outboard
For now I'm super relieved.
Feels good to not have a broken boat!

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