Australian Seagull

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Took the wife and 2 boys up to see chris and his wife julie today. Chris helped me out with a heap of parts to have the little gull running properly, Thanks again chris. The motor is on the stand, and ready to start up tommorrow for a test run. All of the seagull stuff was just to much to handle for the 2 boys, so we took them down to suttons beach for some lunch at the cafe, and a play on the beach and playground, Thanks again chris. And i will let you all know tommorrow how it went.

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I started the motor up today and gave it a fair run in the test tank. I filled the fuel tank up, and ran it till the tank run dry. I fitted a digital rpm and hour guage to the motor, and set the throttle to 4000rpm roughly. I got 2.6 Hrs on the hour part of the guage. So i am going to take a guess and say that i should get a good 1-5hrs of running time on the dinghy. I have never seen a seagull working B4, And i must say, Man these things are such an oily thing when running. Ive posted up some pics after the 2.6hr run, You can see oil comming out everywhere. I fitted the original air horn. But i went back to the original villiers lawnmower air intake because the other one was restricting the engines performance. Next up will be a run in the dinghy once i get it back from the paint shop. Here are some pics, and a short vid.


http://youtu.be/dReV1CcxeWc

[chris]

hello Kean, lovely oily things aren't they, it is good it ran that well,
probably find it a different story when it is under load on the back of a boat

[Keith.P]

Its not just coming out the exhaust, it's coming out of every orifice, it's running too rich, if it will not run with the right carb setup, then it's pulling air in.
You can run them all day on 10:1 without looking like that.
Sometimes you will get an old motor that has been setting around for sometime, with all the fuel evaporated in the tank, leaving just 2 stroke and adding a fresh mix will just double the strength if you don't clean the tank out before you start.

[1650bullet]

Its not just coming out the exhaust, it's coming out of every orifice, it's running too rich, if it will not run with the right carb setup, then it's pulling air in.
You can run them all day on 10:1 without looking like that.
Sometimes you will get an old motor that has been setting around for sometime, with all the fuel evaporated in the tank, leaving just 2 stroke and adding a fresh mix will just double the strength if you don't clean the tank out before you start.

I thought they are supposed to run oily like this.?????? I dont know about the jets that it has in it. But does anyone know what jet i should be running. I will have a look at it. Im kinda thinking with all that oil, It wont sieze. and oil is pushing out any sought of moisture.

[Keith.P]

The top of the carb slide has an adjuster screw for mixture, the screw should sit about flush with the top of the slide.
Give it a tune up with the right carb cover.

[1650bullet]

The top of the carb slide has an adjuster screw for mixture, the screw should sit about flush with the top of the slide.
Give it a tune up with the right carb cover.

Ive Checked the jet needle. It has got a number 2 on it. So its the 25-1 setup, Its also flush with the top of the slide. I will give the needle one full turn down and see how it goes from there. If its still running oily. I will just leave it go. It is an old motor, and we do have different climates here from the land down under.

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Took the flywheel cover of today to have a look underneath, and file and gap the points. I took a pic to show the points. Can anyone out there tell me if the points should have a cover at all.

[Daryl]

None of my Wipac points have covers on them. Runing a Seagull at 4000RPM with no prop on to load it will run rich. Best to set mixture with prop on & pushing a boat. Seagulls are meant to have a load on them.

[1650bullet]

None of my Wipac points have covers on them. Runing a Seagull at 4000RPM with no prop on to load it will run rich. Best to set mixture with prop on & pushing a boat. Seagulls are meant to have a load on them.

Thanks Daryl. Still learning about these old Stalwarts. After doing a heap of browsing on this website, Im slowly picking things up.

[phil]

I can't imagine or fathom why anyone would think it was appropriate to run a motor at close to full throttle and no load for more than a few seconds at a time.

[1650bullet]

I can't imagine or fathom why anyone would think it was appropriate to run a motor at close to full throttle and no load for more than a few seconds at a time.

Simple answer??? If its going to blow up. It would of done it there and then, And not out on the water. Thats why they call them test tanks. And 4000rpms is not a huge amount of revs for such a motor, Most engine manufactures would test there motors at full revs and rattle them to the point of self distruction, before they pass them for inspection.

[Keith.P]

Most engine manufactures would test there motors at full revs

Most engine manufactures do test motor in a tank, but not without a prop on, that's why they use a test tanks.
Some do run without a prop on, only because they have something small like a bucket to put the motor in and it will not pump with that small amount of water.
You don't pull the wheels off your car to test the engine?

[Collector Inspector]

A test tank is probably not a correct term.

More, a run tank, prop on or off. Kinda like how something is for future?

A test tank with an outboard has a test wheel, Seagull never made one I would imagine. The test wheel simulates a motor on a transom inducing a load for the motor to respond to in many ways.

You have run the motor, unloaded at 4000rpm without a load, yes, oil will come out of everything over your estimate of run time at that. Gulls do not have seals anywhere so the simple fact of fuel oil mix swishing about internally without a load will want to basically "Escape".

Escape is not a bad thing but 4000rpm with no load is.

I could go further with why it is bad but, really, I have no time right now.................maybe someone could point out the basics for me?

I ran my SJM in a video with no prop for an hour after a very tight re build of my own specifications. At no time did the revs go over 1500rpm unloaded. I wanted to loosen it up internally and check piston for high spots after.

It still needs a boat to push for final running in. Maybe two tanks, we will sea

I would seriously have a good look at every joint and fastener with your power head for proper alignment and fastener tension now. It may well be advisable to check the crankshaft big end play as well. This can be done without pulling anything apart. Through the spark plug hole.

No load equals no limits for the reciprocating mass.

B

[Hugz]

Last summer I came across a parked late model Jag on the side of the road with smoke pouring out of the twin exhausts. I noticed a guy motionless in the drivers seat. I assumed the worse and thought that he expired, but he had just taken a nap with foot on the accelerator to keep the Air Cond running. A very expensive chilled nap!