| Author |
Message |
    
Matthew Balkwell
Senior Member
Username: matt
Post Number: 126
Registered: 04-2006
| | Posted on Thursday, January 20, 2011 - 04:13 am: | 
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Our p55 has the odd habit of starting first crank or many cranks later.
Lately it is the later , i know the fuel tank does not have much height to feed the carby, but the tickler pushes fuel easily out of the overflow hole.
Fuel also leaks from the jet assembly to the drip tray.
Today for example the engine took heaps or cranks and swearing to start, we went on a run for a few hours and boat was put on the trailer whilst we had lunch.
Took the RubyToo home a few hours later hooked up fresh water to flush and off she went with a flick off the flywheel.
We use a stop cock at the tank to turn the fuel off, but nothing at the carby.
Matt and Ron |
Laurie Derwent
Senior Member
Username: laurie_d
Post Number: 83
Registered: 10-2009
| | Posted on Wednesday, January 26, 2011 - 10:32 pm: |
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Mathew,
I have no experience with the Stuart Turners and I have found Blaxlands will usually start easily when cold (not so for mine when hot but that seems to be a common 2 stroke issue). You seem to say that you don't have trouble getting fuel through but, as your example indicates the problem is with starting after a break of some time, you could try spraying some WD40 or similar into one or both cylinders (spark plug holes) before the first attempt. That can help with priming and an initial kick over when cold. Regards Laurie
ps I know I promised some pics of my boat some time ago..I'm still getting around to those (it's hard to do when I'm using it) I gave it a good run on Boxing Day to see the Sydney-Hobart boats go by (we got up to about 2 nm off Coogee)and had a couple of runs up the Woronora after that. |
David Stott
Advanced Member
Username: david_stott
Post Number: 37
Registered: 06-2005
| | Posted on Thursday, January 27, 2011 - 06:03 pm: |
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Matt, On my P55 in Penguin, I have a second fuel tap at the carby so I can turn the tank tap on first usually before launching to prime the fuel line. (Backing down the ramp is good for this). With only a tap at the tank I have found problems in getting fuel to the carby, be it airlocks or what I dont know. Before I installed the second tap I had unpredictbale starting, or could start and then stop just after leaving the jetty due to fuel starvation. Keeping the line primed seems to work and I always get a good start hot or cold. Incidentallly I only use the choke and dont flood the carby. |
Matthew Balkwell
Senior Member
Username: matt
Post Number: 127
Registered: 04-2006
| | Posted on Monday, January 31, 2011 - 03:00 pm: |
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Thanks for your replies Laurie and David, a tap will soon be put on before the carby.
I will also look changing the level of the carby, as with all the gear loaded and myself upfront cranking it might be taking fuel away from the carby.
With the boat on the trailer and a saw horse under the trailer with the bow slightly up she will start with a flick on the fly wheel hot or cold. |
Malcolm Russell Ward
Advanced Member
Username: russell
Post Number: 44
Registered: 08-2003
| | Posted on Monday, January 31, 2011 - 03:28 pm: |
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Just a side issue which may have some relevance. The fuel we have in NZ these days evaporates at a much lower temperature than in the old days. My old MG will get vapour locks in the fuel line on real hot days -shows starvation signs. Fuel also seems to get stale really quickly when sitting round in half empty tanks. I always turn the Stuart's fuel off to stop when I'm not going to run for more than a day or so. |
David Stott
Advanced Member
Username: david_stott
Post Number: 39
Registered: 06-2005
| | Posted on Monday, January 31, 2011 - 05:34 pm: |
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Matt,
I would not alter the level of the carby just for the starting. The choke, or flooding it with the tickler should provide fuel to start. Ruby too ran well last time I saw her at Totonto, so your float level must be about right in normal running mode.
Sounds like the fall from the tank to the carby might be too little if the problem does not occur when the bow is lifted. |
Matthew Balkwell
Senior Member
Username: matt
Post Number: 128
Registered: 04-2006
| | Posted on Monday, February 07, 2011 - 11:18 pm: |
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Well this morning she would not start, fuel streaming from the bottom of the jet assembly into the drip tray.
So i took off the float and jet assembly and tilted it towards the jet and no petrol came up to the top of the jet even when pushing down on the float, so i then took out the jet and made sure everything was clear and not blocked, put it back together gave the carby a tickle and off she goes.
Engine runs without fault all morning and after lunch started with a half hearted flick on the flywheel.
Has anyone got an idea?
Ps we went past your place Laurie and checked out the Falcon. |
David Stott
Advanced Member
Username: david_stott
Post Number: 40
Registered: 06-2005
| | Posted on Monday, February 07, 2011 - 11:41 pm: |
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Matt, The engine runs well and starts again later on, and it is just the intial start that is the problem. Sounds like a fuel supply problem to me. Have you explored the airlock issue and fitted the second fuel tap?
Petol pouring out initially sounds like flooding. Have you got a sticking needle valve or float? Test this by turning the fuel on but dont touch the tickler. If it still runs out then you have sticking needle valve or float. Are you sure you dont have a leak from the inlet pipe into the carby?
When no fuel arrives at the needle- that is a supply problem and could be the airlock issue. By the time you have fiddled around, fuel then has time to run through and arrives at the carby. I turn the fuel on before launching to give it time to run through. |
Matthew Balkwell
Senior Member
Username: matt
Post Number: 129
Registered: 04-2006
| | Posted on Tuesday, February 08, 2011 - 12:09 am: |
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David, the tickler and float valve seem ok, i am beginning to think the problem is related to evaporation at the carby, it has been over two weeks since we took The RubyToo out and some very warm weather.
If i dont soak up the fuel left in the drip tray after a run it turns into a very thick oil like gunk, maybe this is whats happening inside the jet assembly.
I found a 5/16 fuel cock on ebay and this will be going on as soon as it arrives in the mail. |
Laurie Derwent
Senior Member
Username: laurie_d
Post Number: 85
Registered: 10-2009
| | Posted on Tuesday, February 08, 2011 - 12:22 am: |
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Mathew, It sounds like you are getting closer to solving the mystery. I've never been keen on running a two stroke out of fuel but know the problems you can have starting them after a break if they glug up (ask my chain saw). Glad the RubyToo is getting out and about. There is a long story about the 'Falcon' but in short it was built in Oatley just over 100 yrs ago for my great grandfather. She is 22' and was based on the skiff design of that time. My (red) boat lives on the slip just inshore from there. Regards Laurie. |
Matthew Balkwell
Senior Member
Username: matt
Post Number: 133
Registered: 04-2006
| | Posted on Thursday, May 19, 2011 - 08:35 pm: |
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Laurie, its been a long time between posts for me but i have a few questions about the Falcon.
My dad says that there were shipwrights called Fletchers working out of Oatley Bay at the time the falcon was launched, and also my skipper on the historical eighteen footer i sail on tells me it might be a Golding design.
I am on nightshift again soon, so you might see us on the river.
Matt and Ron. |
Laurie Derwent
Senior Member
Username: laurie_d
Post Number: 100
Registered: 10-2009
| | Posted on Thursday, May 19, 2011 - 09:03 pm: |
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Hi Matt, Thanks for the info. My understanding is that the boat originally named 'Neverfail' was built in Charles St Oatley. My cousin who owns her may have more details. He told me recently that he is planning some work for her, so I'll try to ask him. Looking forward to seeing you on the river. I have yet to get my ac together and put in some pics of my boat. Regards Laurie |
