Modifications - a good idea or not?

Having problems with a Seagull? - ask an expert here

Moderators: John@sos, charlesp, Charles uk, RickUK, Petergalileo

daydreamingdave
Posts: 6
Joined: Tue May 29, 2018 10:33 pm
Location: Ireland

Modifications - a good idea or not?

Postby daydreamingdave » Tue May 29, 2018 11:49 pm

Hi all,
Last year I purchased a model 90. Against all the advise I bought it sight unseen off eBay. I am in Ireland and the 'gull was in Poole.

The model number is EFNR 564FF9

Well a house move, a broken leg and a year later I unwrapped it, checked it over and started it. All good. The cap on the tank says 10:1, so I dont think that is original. The prop is a 4 leaf clover type and the gearbox has three screws holding the cover on.

The carb is on the starboard side and the tiller arm is on the port side. I have no idea if this is the right setup.

What I want to do is fit it to my 17 ft wooden open fishing boat. To get the prop in the best place, so it pulls clear water I will need to extend the leg by 9 inches.

Is this a mad thing to do?

I have no problem with physically doing it. I also plan to add water injection into the exhaust tube.

Will the back pressure be too great?

Lastly, is this the right prop?


Any ideas are welcome!

Thank you,

David

User avatar
Charles uk
Posts: 4250
Joined: Wed Feb 27, 2008 4:38 pm
Location: Maidenhead Berks UK

Re: Modifications - a good idea or not?

Postby Charles uk » Wed May 30, 2018 12:23 am

Does the prop have an internal or external spring?

A picture of the prop & a couple of pictures of both sides of the whole motor would enable us to give accurate answers.
Make it idiot proof and someone will make a better idiot.

thcl500j6
Posts: 6
Joined: Mon Jul 17, 2017 12:48 pm
Location: Brisbane QLD

Re: Modifications - a good idea or not?

Postby thcl500j6 » Wed May 30, 2018 7:19 am

This is what the longshaft version looks like

20150421_132105.jpg
20150421_131012.jpg
20150421_131207.jpg
20150421_131239.jpg


This is a Tasmanian engine thats why the pictures are upside down, its
"Downunder" its i a lot better condition now.

This was the engine Adrian found for me.
You do not have the required permissions to view the files attached to this post.

daydreamingdave
Posts: 6
Joined: Tue May 29, 2018 10:33 pm
Location: Ireland

Re: Modifications - a good idea or not?

Postby daydreamingdave » Fri Jun 08, 2018 1:52 am

The prop spring is inside the prop.

What I am after is thrust. Is there a better prop or is this the thrustiest?
You do not have the required permissions to view the files attached to this post.

daydreamingdave
Posts: 6
Joined: Tue May 29, 2018 10:33 pm
Location: Ireland

Re: Modifications - a good idea or not?

Postby daydreamingdave » Fri Jun 08, 2018 1:55 am

Some more pics
You do not have the required permissions to view the files attached to this post.

User avatar
Nudge
Posts: 637
Joined: Sun Feb 15, 2015 2:43 am
Location: Auckland, New Zealand

Re: Modifications - a good idea or not?

Postby Nudge » Fri Jun 08, 2018 7:19 am

Take another pic showing us the motor in the down position on the back of the boat and indicate where the water line on the boat is.

Is it a case of not having enough thrust or is it more speed that you are really after?
Is the boat being used in salt or fresh water? If it is salt what is the tidal flow like?
"THE KING OF BLING"!
Is it better to over think, than not think at all?

daydreamingdave
Posts: 6
Joined: Tue May 29, 2018 10:33 pm
Location: Ireland

Re: Modifications - a good idea or not?

Postby daydreamingdave » Sun Jun 10, 2018 2:04 am

It is thrust I am after. It is a displacement Hull so speed is not an issue.
Fresh water on Lough Ree in Ireland. The river flow could be up to 4 or 5 knots I suspect.

I will post a pic of it in the down position tomorrow, and you will see why I need it lowered.

daydreamingdave
Posts: 6
Joined: Tue May 29, 2018 10:33 pm
Location: Ireland

Re: Modifications - a good idea or not?

Postby daydreamingdave » Sun Jun 10, 2018 9:21 pm

As you can see the motor is a bit high. The idea is to place the prop behind the lower part of the Y transom so it pulls clear water.
If I extend it by 9” it will do the trick. That way the Skeg on the gearbox is just above the keel line.
I may need to do something to reduce back pressure.
I am planning to inject the water into the exhaust pipe but I may also drill a hole just below the new waterline.
You do not have the required permissions to view the files attached to this post.

thcl500j6
Posts: 6
Joined: Mon Jul 17, 2017 12:48 pm
Location: Brisbane QLD

Re: Modifications - a good idea or not?

Postby thcl500j6 » Mon Jun 11, 2018 1:36 am

Hi if you were in Australia i would offer to swap you a long shaft motor for yours, and you'd be sweet. try mounting the motor off center, and see how you go, that will give you clear water flow under the hull, for the motor, fishermen have been doing it for years.


131432805_c9516d32f3_o.jpg
britishseagull-boat.jpg


Sorry i didn't have a picture of the EFNRL on the boat.
You do not have the required permissions to view the files attached to this post.

User avatar
Nudge
Posts: 637
Joined: Sun Feb 15, 2015 2:43 am
Location: Auckland, New Zealand

Re: Modifications - a good idea or not?

Postby Nudge » Mon Jun 11, 2018 9:22 am

Hi if you were in Australia i would offer to swap you a long shaft motor for yours

I will do a swap as long as he pays the shipping both ways from New Zealand! :mrgreen:

If you can try a transom bracket before you change the motor.... once you have cut it, you have cut it and there is no going back!
"THE KING OF BLING"!
Is it better to over think, than not think at all?

daydreamingdave
Posts: 6
Joined: Tue May 29, 2018 10:33 pm
Location: Ireland

Re: Modifications - a good idea or not?

Postby daydreamingdave » Thu Jun 14, 2018 2:24 pm

Not sure putting it off center will do the job.

Not planning to cut things, but to make new, longer extensions. I can always put the original back together.

It’s more about keeping the bottom end in the water when I am standing midshipmen or up front.
You do not have the required permissions to view the files attached to this post.

roxylass
Posts: 73
Joined: Sat Jul 10, 2010 8:01 pm
Location: scotland

Re: Modifications - a good idea or not?

Postby roxylass » Thu Jun 14, 2018 8:08 pm

Get a transom bracket it will drop your engine a good foot


Return to “Help”

Who is online

Users browsing this forum: No registered users and 2 guests