Choke Housing split pin

[Hugz]

Give it a backwash..... hose into water outlet hole (I use a mercury hose nozzle) and see if water comes out the bottom end. Hopefully the block is not too rusted up. Steel impellor that doesn't touch the sides so no wear. Also add some more water to your tub and perhaps remove prop. Not even a drip or two?

[stevo7790]

No nothing,

But I have to make sure I have things right on this... 2 little slits behind the propeller on the other shaft are where the water enters the engine correct?

When I take the engine out of the water, water does empty from it.

Can I take the side of the block off where the exit hole is on the block itself? also is there anything else I need to check?

Thanks again

Steve

[Hugz]

Yep, that is where the water enters. Water will drain out of the pump housing. Unless you feel like grinding and wielding, no you can't take the sides off. Any cracks or distortions? Usually on the Port side. The head can come off with great difficulty and then the waterways can be scraped clean. Try the flush then we can discuss further. Maybe the water tube has come undone in the exhaust tube where it attaches to the block.

Have a read of HA's post: http://www.saving-old-seagulls.co.uk/fo ... 937#p11937

[stevo7790]

Hello Hugz,

I had some time today to look at the engine.

The block looks ok to me, no cracks or distortions.

So I stripped the engine and rebuilt it, minus the block and carb area.

I was surprised all the screws came out fairly easily anyway the impeller is cracked, its a plastic one and has been glued in the past ?!?! I thought this was quite funny. It is cracked all the way through from one side to the other so will need replacing.
The water tube was blocked, I removed the exhaust casing and unscrewed the pipe from the block cleaned it then gave it a good blow, some black goo came out, I then re-screwed the pipe back on the block again and blew again, water came out the exit hole on the block itself, success!! so I know that's good.
The gasket that is in-between the propeller/gearbox housing was in good nick so I cleaned that to and replaced it.

I thought that the impeller might be able to push some water up the pipe, but no, engine turning over and no water flow, so turned it off again. I can only guess that the shaft is spinning the the impeller isn't moving, any thoughts?
I'll get a replacement impeller bought now.

Steve

[Hugz]

Good Evening Steve,

I haven't come across a plastic impeller. With your permission, I might refer you to some of our more learned gentleman.

Hugo.

[stevo7790]

Hi Hugz,

That's fine with me

I have emailed John asking for the spare I need, he is going to invoice me, its about £6.50.

I am just wondering though as the impeller does seem ok on the shaft if maybe it is the wrong way round and thats why no water is being circulated through the block?!?!

I will have a look tonight, I'll remove the prop shaft and see, it could also be that the bin I have filled with water is too narrow and that could be causing an issue.

I have a few ideas and will record my results in a few hours.

Thanks again

Steve

[stevo7790]

Ok,

I have had a look, i removed the propeller/gearbox housing and gasket and with a drinking straw blew water up the water pipe, nothing, so I tried at the block end and some drips came out.

I removed the exhaust housing and loosened the nut holding the pipe to the block and when I blew water up the pipe it came out of the block, so that tells me that the block isnt blocked and neither is the pipe

Still I left the nut loose at the top of the exhaust housing and when the engine started still no water coming out lol! how frustrating!

I'll speak to a friend see if he can help me with the 'need a bigger bin' problem

Steve

[Charles uk]

Steve if you remove the prop you can almost run a seagull in a bucket, as long the the water level is 2 inches higher than the cavitation plate, just make sure you don't over rev the motor.

Remove the power head from the leg & then remove the exhaust tube do up the water delivery pipe nut if your confident it's clean all the way through if not clean it properly, now connect a garden hose to the lower end of this pipe & turn it on.
How much water comes out of the tell tale?

Report back & we will move onto the next step.

[stevo7790]

Hi Charles,

I did as you said, and no nothing, yet if i blow water up the pipe it comes out of the exit hole.

Bad news though... i suspect i have found a hairline crack it was hidden by the exhaust housing, it is on the bit of the head that the housing pushes onto and then is clamped onto with the bracket and bolt

When I blow down the tube the water doesn't more through freely there is a lot of what feel like resistance

[Charles uk]

Your going to have to remove the cylinder head & clean out the water jacket.
How to do that has been posted on here several times, so have a search.

There are only so many times we can type the same instructions.

[stevo7790]

Charles,

Thats fine I was just looking for advice on the probable causes, I'm more than capable doing the work just needed a bit of direction

I appreciate your help

[stevo7790]

Hello chaps,

Well all sorted now, blimey what a journey.

I replaced the impeller, cleaned the pipe that takes water up to the block, cleaned the prop housing, used de-scaler in the water jacket inside the block and result absolutely nothing! water pumping system still not working.

So I sent my beloved engine away, not wanting to shear a head bolt I let somebody else deal with it.

Engine left Monday, last night 7pm was repaired, what was the problem?... I'll detail it now.

To start with the block as suspected was full of debris and grime, this was all cleaned out, however there was still a more than needed amount of pressure that had to be applied to get water through the block, it was investigated and where the pipe meets the block is that thread that the pipe is connected to via a screw/nut. There was a nasty blockage up behind there, once removed water seamlessly travelled through the block.

Put engine back together, but still no water being pumped! in-fact water was not only getting so far up the pipe it was also filling up inside the exhaust housing?!?!!?

The spark plug needed replacing as it was worn on the thread and was leaking out onto the block so that was sorted, still no water.

I spent a lot of time on the phone to the workshop and decided that if the gasket that splits the prop housing from the exhaust and drive shaft housings was good and the impeller wasn't failing then replacing the bottom housing was the way forward... and yes that fixed it finally so the assumption was made that there was a crack in the prop housing causing water not to travel along the path it was meant to.

Parts replaced fixed:

Block cleaned - Gasket replaced.
New spark plug
New gear box housing
new prop gasket
new gear oil
new water pipe

I'd like to thank everyone that replied and helped me with my thread, I'll take some pics hopefully on her 1st outing once the weather is better and the repairs to my inflatable have finished, 1st patch went on today

Thanks all

Steve

[Hugz]

Be interested know cost of parts and labour. Good to see that some consider Gulls are worthy of professional attention.

I still believe these will be an appreciating collectors item in the not too distant future.

Good luck with it.

[stevo7790]

When I get the invoice Hugz,

I'll send you a message

Steve

[stevo7790]

Ok,

All has been well with the engine on a few garden starts weather is still no good, however I do have a minor problem, that's more annoying than anything else.. I'll be descriptive as I don't know the correct terminology.

Engine starts, water pumps all good... however fuel leaks from the primer hole common fault I hear you say, I then hear take off the top of the carb and you'll find the float inside isn't upright... in my case it is and I still can't get the fuel to stop coming out of the primer hole?!?!

Any ideas?