hi i just rebuily my carby and put it all together but when i press the speed then let got it dosnt fully go up it gets stuck until you move the throttle up!

also on low revs why is their like a hesitation laggy feeling and when you fully press brakes and floor the speed the engine dosnt gain speed it just stays at one low speed?

also i advanced the timing 2 degrees so from 7 to 5 would this cause any harm i use 98 octane fule?

Thanks!

does the throttle slightly jam at that position or just doesnt seem to have enough spring?

if it just needs more spring you can change that or cut it a bit shorter to get a bit more force from it. but thats not a good idea if the throttle is actually jamming for some other reason

hesistation when you first press the accelerator often indicates a problem with the little throttle pump on the carby

if you brake and accelerate at the same time the engine will only rev up if the clutch is slipping or the engine power is overcoming the brakes... you need a fair bit of power to do that

98 octance fuel should allow you to run more timing safely not less, from 7 to 5 is a decrease

hi i have put 2 springs on just to see it help but still stays stuck a bit but alot better now with 2 springs.

also the pump was changed wih the rebuild of the carby would it get better from driving or is there something that should be done??

is the timing from 7 to 5 retarding so from 7 to 20 on the timing cover is andvancing advancing to 10 degress from 7 will that be fine on a a12 motor running 98 octane fuel??

Thnks!

Quote:

The engine stays at one low speed because you are pressing the brakes at the same time as pressing the accelerator, release the brakes and it'll go faster.

It sounds like your carb needs a tune, a hesitation when suppressing the accelerator pedal normally means the acccel. pump needs to be backed off a little as it's delivering too much fuel for that given throttle position.

Quote:

As for the sticky accelerator, have you checked you've reassembled all the springs on the throttle valve return? Make sure they're hooked up correctly some can be installed and if they haven't been hooked on correctly they won't properly shut the throttle valves. Some will even do the opposite if they're installed wrong.

Have you also checked that the spring on the accelerator pedal is working and hooked up?

Also check that the throttle cable itself is moving freely within the cable sleeve.

hi thanks for that just wandering about timing could you clear if going towards 20 mark on timing cover is this advancing or retarding so from 7 deg to 10 is that advancing and can the a12 engine take 10 deg on 98 octane fuel.

Thanks!

hi i also all the time at idle or on higher/lower revs i get not fully black but greyish smoke is this because of the carby tune or is my piston rings worn, but it sarts up as soon as you turn the key all the time. I turned the fuel air mixture screw all in then 2 turns out as it said on the rebuild kit instructions any ideas on how to tune??

also i advanced the timing from 7 deg to 10 deg is this fine if i run 98 octane fuel???

also its a a12 engine from a 120y with 157000km original
Thanks!