Poor man's 15inch Mercury race motor

[NZ Sidewinder]

Now I can focus on the powerhead.
Does anyone know how to load photos the right way up?

[LakeFever]

The only way I’ve had any luck with the photos loading correctly is to take them horizontally. Any pics taken with the phone held vertically rotate when loading up to the site

[NICE PAIR]

right clic save (to your computer)

double-clic (to show on your desktop)

use rotate tool (then file-save) your desktop pic file should show the way you want it.

load on site

. clic post quick reply @ bottom.

If you want to enlarge pic, clic edit > select the pic, double clic pic, select size choice, clic save.

Good Luck!

[NICE PAIR]

[NICE PAIR]

You do Nice work!

[NZ Sidewinder]

Getting there.
Here are a few photos from today
That lower Cowl will probably get a tapered cut like a real race one.
The power head is ready to assemble now.
It was a mission to get the cage to rod bolt clearence right.
The cages are stuffed in 5/16 inches but it's no use slotting the rod bolt head because top guided rods drift on the journal.
So I had to make low profile rod bolts.
It was simple in the end but took a while to get there.

[NZ Sidewinder]

Update
Motor goes well.
Running without a tuner.
That means the distance from the base of the block to the open void of the midsection is 1/2 inch.
Motor runs quiet.
This is probably because of the water jets that are spraying the underside of the 1/2 inch thick base plate.
The motor is running stock 2.0L small chamber heads cut .040.
About 31-32 cc
150psi.
Reed cages stuffed in 24cc approx.
Unusual port timing.
.014 machined off tops of pistons because of over cut decks.
Exhaust 1.500/1.550.
Motor turns a 26p Ballistic through 7k easily.
We have only done a few short runs.
The motor is running stats and poppet but has 2 x 4mm jets in the base plate as well.
These jets are in 1/4 bsp plugs that can be accessed from the bottom of the mid when gearbox is removed.
Water pressure at speed is 15psi which I like.

[David - WI]

[David - WI]

[home made tunnel]

I love projects like these! Doin an awesome job, even if from down under! It’s on my bucket list to visit NZ

[NZ Sidewinder]

Be sure to have a look at the k24 11inch project on the diy 4 stroke thread.
I'm working on it full time

[NZ Sidewinder]

This thread is a bit of a shambles.
The outboard runs hard, got 88mph in slow water last outing.