Page 1 of 1
Choke opening time
Posted: Fri Aug 19, 2011 5:03 pm
by Bilge Rat
Hi
I have read in the FAQ's that the choke only needs to be on for a few seconds. My engine seems to need
about 10 minutes before it will give full revs without choke. Does this mean my mixture is incorrect?, if so,
what can I do about it.
Grateful for any help you can give.
Regards
George
Re: Choke opening time
Posted: Fri Aug 19, 2011 5:36 pm
by Keith.P
Yes, it could be mixture.
what motor have you got?
Re: Choke opening time
Posted: Fri Aug 19, 2011 6:14 pm
by charlesp
An of course we need to know which model, can you let us have the serial?
Re: Choke opening time
Posted: Fri Aug 19, 2011 7:49 pm
by Bilge Rat
Yes of course. Sorry for the omission. It' aseagull featherweight NoFS270jj0 with a sealed gearbox.
Re: Choke opening time
Posted: Sat Aug 20, 2011 2:06 am
by Vic
My Featherweight is a few years older (1974) and has a Villiers carb. Yours has a Villiers carb ??
I have leaned out the mixture to stop it 4 stroking. It now needs a partly closed choke for just a little longer than "a few seconds", but not minutes.
I would say without doubt you are running too weak. Check the carb and jet for cleanliness, check the float level.
Ensure that the centre piece is correctly fitted
Don't use stale fuel.
Fuel will keep from one year to the next if stored properly. A part full fuel tank does not satisfy that requirement.
They dont like fuel that has gone stale
The basic setting for the needle is with the adjusting screw level with the piston top but mine is nearly 3 turns down!
Re: Choke opening time
Posted: Sat Aug 20, 2011 9:44 am
by Bilge Rat
Thanks for that Vic, yes it is a villiers carb, the black plastic type. I shall follow your advice.
regards
George
Re: Choke opening time
Posted: Sat Aug 20, 2011 3:45 pm
by John@sos
Would not mind betting the second jet is partially blocked, see FAQ page.
Mix 25:1 on this one....
Regards,
John
SOS
Re: Choke opening time
Posted: Sat Aug 20, 2011 8:41 pm
by Vic
John@sos wrote:Would not mind betting the second jet is partially blocked, see FAQ page.
Mix 25:1 on this one....
Regards,
John
SOS
Thats the one you access by taking the centre piece apart?
I have never dared do that!
Re: Choke opening time
Posted: Sat Aug 20, 2011 11:38 pm
by John@sos
Yes Vic,
a 10mm spanner is all you need to remove the lower secrion, then you can see it, off set slightly towards the intake side. Passageway goes up and turns 90 degrees, it comes out in the bottom of the air intake. Make sure the centrepiece locating scre is properly positioned in the square recess, not the round hole! The round hole is the fuel passage!
A blast of carb cleaner into the little 5mm hole in the intake should clear debris.. Or use WD40!
Regards,
John
SOS