Been a long time since I’ve been on the forum.
Hi Ron, I still have very fond memories of visiting your prop factory when I was over from Australia, you are very kind and accommodating mate.
...
Type: Posts; User: Glenno; Keyword(s):
Been a long time since I’ve been on the forum.
Hi Ron, I still have very fond memories of visiting your prop factory when I was over from Australia, you are very kind and accommodating mate.
...
It goes hard!
It uses heaps of fuel and is fairly loud.
Believe it or not I have never tried a true race prop on it as I know the ratio in the shifting case is terrible.
I put a 12 pitch...
Thanks heaps I will chase it up.
Out of interest has anyone tried the late model 15hp carb on there race 15? I know it would be illegal to race though. I tried one on my 15hp today and seemed to...
Sweet,
Just wondering what the extra exhaust bulge under the hood clip is as I don't see it on any of the a motors on the web?
Also do I need to change the cd pack under the flywheel back to the...
Thanks guys,
Wow 45kg boat , I can do the boat at 45kgs.
I am 74kgs. Are the normal drivers of these boats all kids or do some adults drive too?
Where would I find a race lower unit?
How does the...
Anyone?
Hi there,
I am very interested in learning all about the 15hp omc race motors.
I live in Australia and have lived race boats for a while.
1) What year models of Johnson- Evinrude 15hp motors...
Hi there,
That's funny, I don't think Ron is worried about a hack like me, he is more than welcome to take copies of this if he likes.
Cheers,
Glenno
Hi all,
I added a lot more cup to the prop, runs heaps better!
Needs another balance and a polish now though.
Youtube of test two.
https://youtu.be/itiL0UEKKJY
26.5mph on crappy old heavy...
Hi all,
I did make the prop with a tiny cup but it's near non existant. I have added more cup and I will try it again, starting at full height (prop shaft 1/2 below bottom of boat).
Cheers,
Glenno
Hi all
Just tested my home made prop at all transom heights from centre of prop shaft level with bottom of boat all the way down to standard full depth in 1/2 inch increments. Didn't seem to hook...
True not 30hp, as many mods as imaginable to the power head. 1 to 1 gear ratio, props ranged from 13 pitch to 15 you can probably calculate the revs yourself, I never had a tach connected. Total set...
Cheers Ron, it will be interesting to see how it performs. I will cut the skeg of for sure.
About my accident- the boat is pictured below.
I will post some footage of the boat running too.
It...
G'day,
Thanks heaps guys and thanks for all the input.
All finished now and polished.
It's been a fun project, I am a builder (houses etc) so this has been fun as it's creative but very different...
Hi mate,
That's exactly what I did, great minds think alike! I did lay some thin steel on top of each level. The heavier blades drop to the bottom for sure. I even turned the threaded rod 180 deg in...
Hi all,
Just finished balancing the prop (static ballance)
Thought a good way to test for vibrations would be just wack it in my drill.
Youtube of test prop spin on drill rig.
...
G'day,
Hub is going well.
Aligning the main centre hub took a bit of tinkering to get correct. The bushes centre themselves.
Just need to dowel the bushes, ballance and polish.
Ps: I will take...
G'day,
Hopefully all the pieces should self alighn as they push into each other.
I will spin the prop before welding the centre hub to outer hub for sure to check if it's all aligned.
Cheers,...
Hi all,
I had 2 hours designated play time today so got some hub components fabricated. Need to press the components in and weld the main centre hub to the outer hub and then dowel the bushes in....
Hi all,
Well that was hard!!!!
Getting the blades perfectly positioned took a bit of fiddling, Ron was correct of course about measuring the tips. There is 185mm between each tip to tip...
Hi there,
Sounds like shot peening is a good idea, does the process make the welded area more maluable and less inclined to crack?
And I will try to get no voids under weld foots.
I do like the...
Hi there,
I know the hub is 316L but I'm not too sure what grade the blades are, they are off a 25hp omc stainless prop. I have 316L rods here in 2mm and 2.5mm, I did a small tack weld and it was...
G'day,
I am stick welding. Done plenty of stick with normal steel and also mig set up for alluminium (built a alloy boat as well) I am also competent with brazing. Unfortunately I have not had much...
Hi there,
I wasn't thinking of peening the beads, I'm not too familiar with the process and I don't have any mechanical means, I guess I could use some sort of pointy hammer or punch system though....
Hi there,
I will definitely chamfer off both sides of the blades where they are to be welded to the hub to get better weld penetration.
My greatest concern now is controlling the pulling action...
Hi there,
I definitely will measure the tip to tip before I weld fully, good point.
The motor is an 8hp Tohatsu (slightly modified) hub size is 60mm od and I am trying to achieve around 13 pitch...
Hi there,
Hi Ron, hope your well. With blade position I have put a centre punch mark on the hub (in picture below, I am pointing a scrap piece of steel at it). I got these three marks by just...
Hi,
I will make sure to leave a good amount of weld on for sure, good info Jeff, last thing I want is for it to tear apart.
Just gave all members a quick buff to make final finish easier.
Cheers,...
Hi all,
Just finished the jig for holding the blades as I weld. We will see if it works, I know as soon as you tack weld stainless it moves, I am hoping to get this thing really accurate but at the...
Hi mate,
Yep the blades are progressive pitch the whole way up the blades.
It will be 13 in the centre. I have three props here that are 13 pitch which I am modeling my pitch off, two of those...
Hi all,
I Have added a trailing lip to the blades, they all still need to be sharpened and polished.
I have also started on a pitch block (I decided it does not need to be that pretty as I will...
Hi all,
I am giving making a tubed cleaver for a 8hp Tohatsu a go.
Chopped blades of one of my Johnson 25hp stainless props and re-shaped, still a bit of fine tuning on blade shape to go.
Will...
True, at the level this motor is modded a single carb could do the same job for sure. But two carbies is really cool, just something I wanted to do. I had a pile of old omc 9.9hp and 15hp junk and...
Hi Jeff
I am not sure about the affect on power band from the long intake. I only did them so I could fit the 2 carbies on top of each other (there was no room tight to the reed cover). The power...
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Just thought I would post some pics of the finished motor. I ended up putting 2 15hp carbies on, high speed jets took a while to sort and had to put on some...
Hi all,
I am a fellow racer, I dont race the 4.5hp though, would be a long slow race!
Just wondering if any one else has a 4hp or 4.5hp deluxe johnson (around 1981 mod) that would be willing to...
Hi all,
I was wondering if any one out there has modified the older smaller capacity 15hp omc.
I would apreciate any input as I have started a few mods on a junk motor I have.
I will start with...
Hi Phill,
Now you will get lots of good input from lots of people I am sure!
remember also with props that if its stamped 24 it may be actually 22,23,24,25 or 26 by some one elses pitch...
Hi Phill,
Now we are talking!
What is make and HP is your outboard? And what sort of boat are you running it on?
6000 is good rpm for fully submerged, sounds like a good start!
After we all...
Hi Phill,
I dont think your being thick or smug, I ran through all the same questions when I started racing, as the way race boats props run was also against everything I had learned over a life...
Hi phill,
I have been pondering on the good questions you have raised about surface props etc.
I will try to explain what I have found with surface piercing props through the years I have...
Hi all,
I definately dont run extra pick ups, I would be disqualified, the scruteneers would see it strait away.
yes the cone is to pick water up but the speed is gained by reducing the amount...
Hi again,
I forgot to say in regard to set back- a lot of the guys running in the mono hulls at our club have no set back at all and are running the centre of the prop shaft in line with the...
Hi Jeoff,
Yeah I noticed a massive diference in a number of ways.
1) without the nose cone I would never be able to run the motor as high as i do and still pick up water (our rules dont allow...
Hi all,
Sory I didnt catch this thread earlier, I love talking nose cones!
Phill, I really think you would be fine just to make a two part filler nose cone. I race the 25hp and 550cc super...
Hi mate,
I race 25hp boats here in Australia, I run the mercury sea pro 25hp (built in japan by tohatsu).
I had the same issue when I bought a 10 by 18 merc chopper, even down to buying a wrong...
Hi there,
We use these trim blocks here in Australia for our fine trim adjustment.
we just make them ourselves.
Well done and have fun,
Glenno
Hi, The 35hp carb is off the older models around 80 and older I think. I have never put the 35 carb on the later 25s but they are the same motor so i dont see why not. The only difference will be...
So its a long shaft. You need to get it up out of the water for more speed so a short shaft is easier as it means a smaller jacking block. But in saying that a taller block should do the trick. A...
See if any of the GT pro guys have any input before going to wild on porting. I believe they are reaching speeds of around 78kph. I rebuilt the late model 25 in the previose pics and noticed that...