Tohatsu 50 modifications

[roflhat]

any plastic would do really, I'd have to have a look at the design again but could be possible

 

[Cornishpowerboater]

okay mate thanks!
i suppose you could 3d print them right?

 

[Cornishpowerboater]

i have bought a mikuni fuel pump mainly for reliability and was wondering if anyone knew how to remove the factory fuel pump entirely like in the pictures as it looks to me like id have to buy a new bowl for the bottom carb and does anyone know where i can get the straight fuel barbs that press in?

 

[roflhat]

When I did it I bought another middle carb and put it in place of the standard bottom one

 

[Cornishpowerboater]

yeh thanks mate ive bought a new bowl from tohatsu im also fitting a jetski primer so i can remove the choke flaps there is a casting lump on each side of the carb throat like in the picture do you think i should be trying to remove them or is it a waste of time?

 

[Cornishpowerboater]

any luck with the reed block stuffer design?

 

[roflhat]

Not had a chance to look at the stuffer design yet, I can post you a set down so you can have a look.

Definitely worth smoothing inside the carbs

 

[Cornishpowerboater]

Okay mate I’m happy to try to modify the design if you’d like to do that?

 

[Cornishpowerboater]

does anyone have any experience building custom exhaust tuners?

 

[roflhat]

Yeh send me your address I'll post the set I have down.
Designed a few exhaust tuners, mostly for the 70hp

 

[Cornishpowerboater]

Have you built them to your spec or homologation?

 

[roflhat]

One of each, I run the homologation spec now

 

[Cornishpowerboater]

What’s the score with designing them do you follow a formula?

 

[roflhat]

Not really more trial and error

 

[Cornishpowerboater]

Ah right yeah do you just weld the tuners up or cnc them?

 

[roflhat]

All CNC, would be obviously much cheaper to weld one up

 

[sailabout]

got the new head on feels way better a lot snappier and its dry stacked too
its up to 180 psi on all three but i forgot to take a reading before i took the old head off so i cant compare unfortunately
i also installed some solid mounts but i only used the top ones so there is still a bit of vibration dampening
whilst it was apart i installed the new exhaust tuner and got rid of the silencer so a bit of weight saving, not a lot but will still help in the long run
i also cut the shelf out of the bottom of the midsection as i thought the exhaust gases will get hung up on it

did you put larger jets in for the extra comp?

 

[Cornishpowerboater]

did you put larger jets in for the extra comp?

No I haven’t played round with the jets at all haven’t really played round with the mixture screw either as the plugs are a good colour

 

[georgesmall353]

this is my current prop its a forge v2 it has been blueprinted and bought up to 19 pitch
it still runs really well im running it with the propshaft at 25mm below the centre of the hijacker valves on my ceasar f11 and it sill grips really well in the turns
super impressed with this prop its a great all rounder

Hello pal!

i also bought a spare powerhead, flywheel and full set of electrics for £100 and was thinking of getting this one ported as my current engine has very little hours on and i feel its too nice to cut into. I will probably end up going to Chris brown marine for the porting and do everything else myself as i have heard that he does a good job
ive been thinking about buying a cleaver prop and im looking at the forge marine v1 in the standard 18 pitch but i can always get it tweaked in the future

Hello pal. Just seen this thread!

Must say really enjoyed reading what you’ve doing. I’m just down the road

i also bought a spare powerhead, flywheel and full set of electrics for £100 and was thinking of getting this one ported as my current engine has very little hours on and i feel its too nice to cut into. I will probably end up going to Chris brown marine for the porting and do everything else myself as i have heard that he does a good job
ive been thinking about buying a cleaver prop and im looking at the forge marine v1 in the standard 18 pitch but i can always get it tweaked in the future

Hello pal.
I must say, really enjoyed reading about what you’re doing. I bought a zap Cat earlier in the year and I have been running a V1 prop on it. I still got lots of tweaking to do and I’m looking to go down the modification route for my Outboard. (Mariner lightning xr50) same as tohatssu

I’m based in Falmouth so if you were interested in testing out the V1 property, you’re more than welcome to borrow mine before buying one. It is only 18 pitch mind.

 

[Cornishpowerboater]

Hello pal!

Hello pal. Just seen this thread!

Must say really enjoyed reading what you’ve doing. I’m just down the road

Hello pal.
I must say, really enjoyed reading about what you’re doing. I bought a zap Cat earlier in the year and I have been running a V1 prop on it. I still got lots of tweaking to do and I’m looking to go down the modification route for my Outboard. (Mariner lightning xr50) same as tohatssu

I’m based in Falmouth so if you were interested in testing out the V1 property, you’re more than welcome to borrow mine before buying one. It is only 18 pitch mind

hi bud your Gs Engineering right?