Saving Old Seagulls

First run after rebuild.

https://youtu.be/gg_8-IIMx-8

Well done, it seems to be very fast

Nice to see your project completed. Looks like it's running well

Nice one

Not bad at all.
Sounds pretty healthy after all it's been through recently
Well done


Jon

Looking good, looks like a nice stretch of coastline for taking a spin out.

You have your engine running very nicely!

Cheers guys. It looks faster than it actually went, and that was with the tidal flow. Going against the flow was markedly more effort. But I was impressed with wat is effectively only a 2 and a bit hp eggwisk . I also bumped (not literally. ..) into another Seagull owner, who was using it for the tender of his sailboat, which he moors on a swing mooring there. His gull was of 59 vintage.

I'm going to need a longer tiller, or at least an extension.
I'm going to see if I can get another prop) to try out different shapes. The three blade I have works well, I wonder what the differnce the four bladed (hydrofoil) prop will make.

Nice I have one just like that also , personally I really like the FPC engines. I hope you enjoy using it

Henk wrote:Cheers guys. It looks faster than it actually went, and that was with the tidal flow. Going against the flow was markedly more effort. But I was impressed with wat is effectively only a 2 and a bit hp eggwisk . I also bumped (not literally. ..) into another Seagull owner, who was using it for the tender of his sailboat, which he moors on a swing mooring there. His gull was of 59 vintage.

I'm going to need a longer tiller, or at least an extension.
I'm going to see if I can get another prop) to try out different shapes. The three blade I have works well, I wonder what the differnce the four bladed (hydrofoil) prop will make.

Got a 40 minus prop 4 blade, as well as a 4 blade weed free 40 minus for sale if yours is a 40 minus or otherwise compatible engine!

Also most of the rest of a 40 minus too!

Carefully does it with props!
There's not an awful lot of choice with the 40 series motors.
Very easy to get this bit wrong if you don't know what you're doing. I'm also dabbling a bit with a 40 "bitsa" of sorts, and trying out different props albeit slightly chopped down in size to cope with the increased pitch on some props.

Your gull currently has the later "sealed" gearbox with a ratio of 2.5:1 so the normal prop for this set up would be the 3 bladed prop it has on right now. Leave it as it is, but if you feel the need you can always tidy up the leading edges of the prop for a cleaner/slicker/sharper entry point. Think of an airplane wing and how it works and apply the same thoughts to your prop. (wink) As you say it's a bit of an egg whisk!

The older "hydrofan" props were fitted to a different gearbox with a different ratio of 10:35 and as a result will turn the prop that much slower for the same engine revs. Add into the mix that the hydrofan props are a bit courser pitched as well so they don't need to be spun as quickly to push similar amounts of water. Hence the different ratios between the 2 types of gearboxes.
Having said that a 4 blade hydrofan prop will fit onto your later gearbox, but i think quite honestly you'd be wasting your time trying a different prop for any increase in overall speed, unless you're like me and refuse to let it beat you without some serious modifications. (it will just bog down and conk out as soon as you engage the clutch)

You could perhaps look at another prop from another manufacturer. Maybe Yamaha,Evinrude or similar but it's probably going to need some modification or adaptation to work with the seagull gearbox. Power was never a strong point with these "classic" gulls so you're quite limited as to what you can do in terms of a "pep-up". Better off leaving as is really.

These might help explain things a bit better

https://www.youtube.com/watch?v=5bj5kjh3l9o
https://www.youtube.com/watch?v=wPKMmjb5gVI



Hope this helps!

Jon

Secret agent, i've sent you a PM about those props

Jon

headdownarseup wrote:Secret agent, i've sent you a PM about those props

Jon

PM replied to Jon,

Mike

Right, I'm leaving it as it is then.