Ford V8 Carb |
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GrumpyGeoff
Newbie Joined: July-16-2012 Location: Uk Status: Offline Points: 27 |
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Posted: July-19-2012 at 12:08pm |
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Hi boys, the boat has a Holly 4160 carb, a full service kit has been fitted and the floats set to the book specs. The reason this was done was the primary jets were dripping fuel at tick over and after the engine had been switched off and guess what? It still is, the cure has been to lower the float to about a quarter of an inch. In the many topics regarding bad tick over, it says check the float level. What is the level that anybody has used in the past that has worked? Or is the fault not related to levels? Holly carbs are new to me, Webbers, sus etc, no problems.,but this boat of my lads is giving me a head ache.
Its only the primary choke thats giving the problem at the moment, previous posts have been my son's and to be quite honest, couldn't change a bell on a bike!! Forgot to mention, this carb has internal float adjustments not the one with the external adjustment and the level hole in the side. Thanks, Geoff (its only the kids that think i'm grumpy) |
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....Don't have children, unless you plan to win the lottery anytime soon!!
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TRBenj
Grand Poobah Joined: June-29-2005 Location: NWCT Status: Offline Points: 21136 |
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If the parts are new and the float level is set properly, and youre still dripping after shut down, then I would suspect a faulty needle and seat. Many new ones have had issues as of late.
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GrumpyGeoff
Newbie Joined: July-16-2012 Location: Uk Status: Offline Points: 27 |
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Thanks for that, but i have swapped the needles and seats for the primary to the secondary, same result!! And the secondary isn't dripping. Having a low level won't be too bad because ther're only doing about 22mph and the secondary is only operating on initial pull out so feul starvation should only occur at a much higher speed, whch they can not afford to do which i £1 40 a litre nearly.
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....Don't have children, unless you plan to win the lottery anytime soon!!
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Bri892001
Grand Poobah Joined: September-27-2008 Location: Boston MA Status: Offline Points: 4947 |
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If you've swapped the needle and seat already, and you still get drippage only on the primary... well, that leaves the Power Valve as something to check, because that exists in the Primary and not the secondary, and it can be a source of leak.
By the way, what do you mean by "Tick Over"? |
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Gary S
Grand Poobah Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096 |
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That's their way of saying idle Brian. When I was young, 15ish I had a Triumph motorcycle,they told you to wash the filter screens in parrafin, but wouldn't that just clog them up??? .Took me a long time to figure that out,parrafin was another name for kerosene.
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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And I almost called Roger for an interpretation!! |
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Bri892001
Grand Poobah Joined: September-27-2008 Location: Boston MA Status: Offline Points: 4947 |
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It would be easier if they would just speak English!!
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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"tick over
vb (intr, adverb) 1. (Engineering / Automotive Engineering) Also idle Brit (of an engine) to run at low speed with the throttle control closed and the transmission disengaged 2. to run smoothly without any major changes" |
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pdhowell
Newbie Joined: September-24-2009 Location: Marylanbd Status: Offline Points: 20 |
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Geoff, I had the same issues you did and found that my fuel pump was putting out more pressure than the springs on the needles valves could resist. I did everything, bent float tabs,replaced needles and seats etc. The solution was a fuel pressure regulator, get one from 1 to 4 psi, not the high pressure regulators for fuel injected system.
Maybe useful. Here is a US link, and you would need a local source, http://www.summitracing.com/parts/HLY-12-804/ |
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GrumpyGeoff
Newbie Joined: July-16-2012 Location: Uk Status: Offline Points: 27 |
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Good morning, sorry about the language barrier, tick over does equal idle, as i said, i changed the whole kit, power valve, all diaphrams etc, i think do a pressure check on the petrol pump ( gas pump )will be a good thing to do next or as you say, put a low pressure regulator in.
I'll have a go this weekend and let you know how we go on. You can get quite a good translation from Top Gear!!! Hood=bonnet, trunk=boot, ( my mum lives in Black Butts Lane) and your navy lads that come over to the submarine yard love to have their photo taken next to the road sign. Thanks again all, let you know |
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....Don't have children, unless you plan to win the lottery anytime soon!!
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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proper link for the convenience of all |
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89Martinique
Senior Member Joined: September-05-2011 Location: Binghamton Status: Offline Points: 457 |
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Error! the page doesn't exist!!!! i just tried it. It said "404 error. Page doesn't exist"! |
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Current Boats:
1992 Supra Comp-TS6M PCM 351w HO Pro Boss Pro-Tec Ignition - Full Composite (no wood stingers!) 1989 (3rd Gen) Correct Craft Martinique B/R PCM 351w Power Plus 1984 E-Scow Keuka Lake, |
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89Martinique
Senior Member Joined: September-05-2011 Location: Binghamton Status: Offline Points: 457 |
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Current Boats:
1992 Supra Comp-TS6M PCM 351w HO Pro Boss Pro-Tec Ignition - Full Composite (no wood stingers!) 1989 (3rd Gen) Correct Craft Martinique B/R PCM 351w Power Plus 1984 E-Scow Keuka Lake, |
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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Joe, Thanks. I did proof the link and it did come up when I did that. I don't know what happened???? |
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