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| Genius suggestions on a stubborn p5 |
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will
New member
Username: will
Post Number: 1
Registered: 07-2004
| | Posted on Thursday, July 15, 2004 - 12:28 pm: | 
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I am presently restoring a 15 foot fishing launch, which has a p5 stuart turner and reversing gear as intended means of propulsion. Unfortunately despite a complete strip and rebuild with replacement bearings, seals and a rewound mag, she just will not perform. Symptomatically the sump seems to fill with a couple of spoonfuls of fuel and then she will not start. once the brass drain plug in the side of the block has been removed and a degree of airing ensued, she will start and seemingly run quite well, until i engage ahead at which point a max of ten yards is covered prior to a resounding lack of will to live and then stop.
I would be incredibly grateful if anyone had any bright ideas as to the routes of my stuarts problems, as at present I am having to rely upon a modern yamaha outboard! |
G Evans
Visitor
| | Posted on Friday, July 16, 2004 - 03:38 am: |
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Will What carb have you got fitted - My experience of the original Stuart carb is that it tends to gulp fuel. And floods the crankcase as you describe. Try tilting the carb backwards a bit,this may ease the problem. Also check the bowl needle is shutting properly. Asume you have set the timing up on the M mark on the flywheel 2inches before TDC clockwise on the flywheel. Have no experience of the Amal carb alternative . I hve fitted a delorto 20-18 9 ex lawnmower that responds well. g |
will
New member
Username: will
Post Number: 2
Registered: 07-2004
| | Posted on Friday, July 16, 2004 - 07:08 am: |
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G
Thank you very much for the advice, I am running a standard bronze stuart carb. Think I have set the timing as you describe on the M mark of the fly wheel. I will definitely try the tilting backwards as you have suggested. If that fails, how easily was the delorto to fit, i.e. does it require an adapter? Thanks again Will |
G Evans
Visitor
| | Posted on Friday, July 16, 2004 - 09:33 am: |
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Will.
It needed a adapter similiar to the slotted bit on the stuart carb, that fits into the induction port.
Have a look at Discussion, Stuart running from a pile of bits.Picture. Where are you located. Could possibly come to a arrangement to make you a adapter !!!!!!. Can provide some better pictures. |
peterogborne
Senior Member
Username: peterogborne
Post Number: 192
Registered: 09-2002
| | Posted on Saturday, July 17, 2004 - 07:29 am: |
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Will , it is quite normal for oil to accumulate in the crankcase, the carry over lubricates big end and main bearings as well as cylinder walls.
It could be that your engine is running too rich or that the petrol / oil ratio is out . Keeping to the old Imperial system ,I use one quarter of a pint to two gallons of petrol. As you have the Solex carb check the float . They quite often develop a leak ,it may only be very small but this will cause your engine to run rich . The best way to detect a leak is to immerse the float in warm water,look for bubbles. If this is the case a touch of solder will fix it.If your engine is starting easly then it sounds like you have the ignition timing right....more like it is a fuel problem. Another good indication is to look at your spark plug ,are the electrodes dry or oily . Oily blck again indicates too much oil in the mix or too rich . |
will
New member
Username: will
Post Number: 3
Registered: 07-2004
| | Posted on Saturday, July 17, 2004 - 10:36 am: |
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Have tried tilting the carb, which does seem to have improved starting. I have noticed however that when turning the gear lever to 90 degrees ahead, something sounds as though it is binding and the engine stops. If engaged to just 45 degrees with the prop spinning happily, there seems to be no problem. Is it possible the crank could be floating more than it should?? I have not tried her afloat with the gear engaged at 45 degrees, but have run her on land for a reasonable time with no problems. I live in East sussex, which I notice from your other submission is not too far away from yourself in Kent. I would be really grateful for a photo of your adapter, and thanks for the offer of making one, might have a bash myself first. How pricey was the carb and where did you source i? Although the origional looks rather pretty, it seems to have been designed to leek!
On a slightly different topic, the P5 I have is fitted with a dynastart, which turns the engine over admirably, but I haven't managed to nut out how to make it charge. I would be grateful for any pointers. Thanks again for the advice.
Peter, think you maybe right about the mix setting. Although the oil fuel ratio I have been running is a little on the mean side with regard oil going by the proportions you have suggested, the plug does seem to carbon up pretty quickly. I am not entirely sure if undoing of tightening the inlet tube leans the mixture? Would also be grateful if you had any suggestions regarding the charging of a dynastart. Thanks alot. |
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Visitor
| | Posted on Monday, March 06, 2006 - 04:02 pm: |
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