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choke piston
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Author:  widowmaker [ Fri Jan 13, 2012 12:40 pm ]
Post subject:  choke piston
I have difficulty starting my H2 when cold. I think the problem is with the (3) brass starter pistons. It's a metal to metal design, which isn't the best, and as a result I think it's not generating enough vacuum to draw fuel into the carb. Does this sound right, and how can I correct it?
Author:  Jim [ Fri Jan 13, 2012 12:44 pm ]
Post subject:  Re: choke piston
It does not sound right, because if the enricher plungers are not sealing, you get more fuel, not less. Do you turn the fuel valve to "prime" for a few seconds to fill the bowls before you try to start it?
Author:  mraxl [ Fri Jan 13, 2012 12:50 pm ]
Post subject:  Re: choke piston
No, it doesn't sound right. It doesn't create vacuum. If the plunger raises and seats properly it is doing it's job. Starting problems are usually associated with the pilot jet and circuit. Clogged jet, wrong size jet, improperly adjusted air screw, clogged channels in carb body, are the usual culprits.

It is also possible that the lo speed winding for the ignition isn't giving you enough juice to start easily.

Put petcock on prime for a few seconds before attempting to kick it over.

edit: Jim, you're quicker than me.... but great minds think alike ;)
Author:  Mikepdutton [ Fri Jan 13, 2012 1:05 pm ]
Post subject:  Re: choke piston
mraxl wrote:

edit: Jim, you're quicker than me.... but great minds think alike ;)


Yes.......and I was thinking the same thing! :shifty:
Author:  Ja-Moo [ Fri Jan 13, 2012 1:12 pm ]
Post subject:  Re: choke piston
Mikepdutton wrote:
mraxl wrote:

edit: Jim, you're quicker than me.... but great minds think alike ;)


Yes.......and I was thinking the same thing! :shifty:



It's just because you both like to wear beer-goggles...... :lol: :lol: :lol:
Author:  Jim [ Fri Jan 13, 2012 1:16 pm ]
Post subject:  Re: choke piston
Ja-Moo wrote:
Mikepdutton wrote:
mraxl wrote:

edit: Jim, you're quicker than me.... but great minds think alike ;)


Yes.......and I was thinking the same thing! :shifty:



It's just because you both like to wear beer-goggles...... :lol: :lol: :lol:

Which two out of three beer drinkers does your "both" refer to?
Author:  mraxl [ Fri Jan 13, 2012 1:19 pm ]
Post subject:  Re: choke piston
Ja-Moo wrote:
It's just because you both like to wear beer-goggles...... :lol: :lol: :lol:

Odd you would say that as we just got thru exchanging emails talking about the finer points of brewing!

Sorry about thread hijack... back to business...
Author:  smoff83 [ Sat Jan 14, 2012 12:35 pm ]
Post subject:  Re: choke piston
widowmaker wrote:
I have difficulty starting my H2 when cold. I think the problem is with the (3) brass starter pistons. It's a metal to metal design, which isn't the best, and as a result I think it's not generating enough vacuum to draw fuel into the carb. Does this sound right, and how can I correct it?



Using a cheap rebuild kit, I replaced these on my H2. They now have nice, new rubber bases to seal the enrichener valve. Even my old ones were brass with rubber bases though (rock hard, cracked rubber) Like the others said, doesn't sound like the problem.

Cold as in engine temp, or cold as in weather? Mine seems to take 5-7 kicks now (average winter temp 30f) compared to 1-2 in the summer and fall
Author:  Jim [ Sat Jan 14, 2012 2:19 pm ]
Post subject:  Re: choke piston
Yes, and I can tell you that an H2 that's kept outside, with good crank seals, that normally takes 1-2 kicks in warm weather takes 10 kicks when it's 15F out.
Author:  vtcat [ Sun Jan 15, 2012 6:37 am ]
Post subject:  Re: choke piston
It's not jetted for 30f degrees
does it have summer gas in it? this can make it start harder
Brec
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