Using fuel like nobodys buisness

Post by **dan45** » Wed Dec 09, 2009 2:50 pm

Been using my minor recently ( 1098 engine) and its only getting like 10 mpg, so im really worried that its gonna bankrupt me! But I have done one thing to try sought it, I ajdusted the mixture nut ( Done it up till the engine started to die then undone a tad) It was running quite rich i think so I shall go to the fuel station and fill the tank and see if its made a diffrence, adjusting the nut also cut the smoke out so hopefully 2 birds with 1 stone! I'm just asking, is there anyhting else I can do to make it better on fuel, like any other mixture screws etc,
Thanks danny

Post by **alanworland** » Wed Dec 09, 2009 3:05 pm

Make sure the suction chamber piston is free and returns down with a 'clunk' (inside the large aluminium dome) - you might have to remove the air filter to get your finger in to lift it,
Is the air filter clean?

Post by **PSL184** » Wed Dec 09, 2009 4:38 pm

dan45 wrote:is there anyhting else I can do to make it better on fuel,

Slow down

Post by **RogerRust** » Wed Dec 09, 2009 5:24 pm

Sounds like you have done the right thing, even heavy footed you should get better than 30 mpg - more like 40 if you try hard.

Post by **rayofleamington** » Wed Dec 09, 2009 5:59 pm

Around town I used to get anything down to 20mpg, and only 30mpg with a fair bit of open road mixed in.

Post by **cormorant** » Wed Dec 09, 2009 6:15 pm

I am on my 4th Minor now (all 1098's) and they all did about 38mpg which is what the book says they do.....something or things are badly wrong to get only 10mpg Dan. Corroded tank? Leaking fuel pipe? Leaking from the float chamber? I think you are dripping fuel somewhere

Post by **PSL184** » Wed Dec 09, 2009 10:58 pm

or the odometer is under reading by a large amount....

linearaudio · Post by **linearaudio** » Wed Dec 09, 2009 10:59 pm

Exhaust smoking! Check the air filter! Mine was like that when I bought it, ran out of fuel 1 mile from the only 4 star petrol supplier in Essex!
If not, and the jet tweaking hasn't done the trick, could be float level too high/ holed, or poorly seating float valve.

Post by **bmcecosse** » Thu Dec 10, 2009 12:59 am

10 mpg is desperate - make sure the choke is not sticking on - and the brakes aren't binding! Take the car for a good run - then pop out a spark plug for inspection. It should be light beige colour, if black = too rich, and if pure white = too weak!

Post by **dan45** » Fri Dec 11, 2009 5:55 pm

cheers for all the replys, It was running way to rich, so I adjusted it and its ten times better now Thank god lol
cheers dan

Post by **PSL184** » Fri Dec 11, 2009 6:18 pm

The black smoke from the exhaust was the clue but I didn't think it would be possible for it to be so bad as to give 10mpg !!!

Post by **alanworland** » Fri Dec 11, 2009 10:27 pm

So, if it's 10 times better - you're getting 100 mpg!! Wow!

Morris Minor Owners Club

Using fuel like nobodys buisness

Using fuel like nobodys buisness

Re: Using fuel like nobodys buisness