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tb42 float jamming

Tech Talk for Nissan owners.

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Posts: 160
Joined: Sun Oct 26, 2008 11:40 am
Location: beenleigh

tb42 float jamming

Post by zookster666 »

im after some info from someone who has experienced the float level jamming openand flooding the engine mine does it frequently and im unsure how to fix it.

i have cleaned the carb and it still does it any ideas

thanks in advance
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Post by mkpatrol »

Pull the float out & put it in some petrol, if it sinks its buggered (not so common these days with plastic floats).

Replace the needle & seat, this is a main cause of flooding. It might look ok but may not be sealing properly. Make sure you set the drop as well as tha closing setting properly.

When you change the needle & seat, check the fuel pressure, if it is too high it will push fuel past the needle & seat.
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Post by Brett S »

on a side note does yours have a glass sight cos mine has steel and therefore cannot check.
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Post by zookster666 »

mine has steel but i pulled it out and checked that when i cleaned it all and it was all good thanks for the info will look into needle and seat

cheers
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Post by PGS 4WD »

They wear a notch on the float where the needle contacts, it you bend the lever so the contact is in a different spot or buy a new float, mostly happens on duel fuel vehicles.
Need to maintain the correct fuel level if you go bending things though.

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Post by micks troll »

Do not buy an aftermarket needle and seat!!! I did this and it flooded so bad i was scooping a couple of cup fulls of fuel out of the air box. The genuine one has a wire piece that goes around the needle and holds the float. Check this is in place otherwise it'll flood like buggery. I bought the complete overhaul kit from autobarn or the likes and it cost around $70 but the needle and seat alone were $50. Use genuine needle and seat and you wont have trouble. hope this helps!

This relates to my GQ tb42
White 92 GQ TD42 LWB (AKA Putt putt)
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Post by zookster666 »

im putting a tb42 efi in now so not gonna waste my time on this engine got the efi one for 900 was rebuilt and has head work done thanks for the help really appreciate it
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