UK Karting - Notice Board (4-Stroke Karting) : GX160 Spluttering and Popping on Start Up

Notice Board (4-Stroke Karting)

GX160 Spluttering and Popping on Start Up
Posted by 'Rhauri' on 23 Oct 2009 @ 23:46

| View Message Thread | Reply to this message |

RhauriJoined: October 2009
Total Posts: 1
[ View User Profile ]

Hi chaps,

Hoping you may be able to help with this one.

One of our engines is playing up. The issue is that it coughs a splutters for a short while, as if it is being starved of fuel and/or air, and will then eventually kick in and run properly. This happens on start-up, and during low down acceleration on-track until we rise above 2750 revs then it runs ok.

If you copy and paste the below Youtube link into a fresh Browser Window you will be able to watch us start it; it demonstrates the problem quite well - be sure to turn your Speakers on/up!

Link: http://www.youtube.com/watch?v=A7Y-YzlZ93A

Things we have tried to combat the problem are:

- Changed and cleaned fuel pump
- Ensured both fuel lines are of identical length
- Cleaned Pilot Jet
- Cleaned Main Jet & Emulsion Tube
- Changed entire Carb (from our working engine)
- Changed exhaust

We think that this engine may have initially been running a 72 sized jet, but we have recently put in a new 70 sized jet. Would reducing the size of the jet cause this much of an issue? I can appreciate that every engine is different and a different sized jet maybe more suitable for one engine than the other?

If we are way of the mark please let me know, all comments and feedback will be apprecaited.

Thanks in advance,
Rhauri

Message Thread:

GX160 Spluttering and Popping on Start Up by 'Rhauri' << You are here!

Re: GX160 Spluttering and Popping on Start Up by 'lard ass bob' (24 Oct 2009 @ 7:33)

Re: GX160 Spluttering and Popping on Start Up by 'Trev' (24 Oct 2009 @ 8:09)

Re: GX160 Spluttering and Popping on Start Up by 'prokartman' (25 Oct 2009 @ 8:02)

Re: GX160 Spluttering and Popping on Start Up by 'Rhauri' (02 Nov 2009 @ 11:00)

Post a Reply:

You may post a direct reply to this message which will appear in this thread.
To post a new or unrelated message use This Form. Top of Page
Notice Board Index

[ UK Karting Main Index ]


News	Karts & Karting	Notice Board	Market Place	Companies Directory	Tracks Directory	Events Calendar	Race Results	Photo Gallery	Links