Kohler CV750--When starting cold engine, I have to pour a splash of gas into the carb to get it to fire up. After it's starts, it runs great at idle all the way to full throttle and if I shut it down, it will start right back up. I installed a new fuel pump and cleaned the carb which didn't help. Any ideas????? Thanks, gregjo1948
This is your first post
You say once started it runs great at idle all the way up to full throttle.
Now from that I read, runs at low idle which is 2200 to 2700 rpm for this engine up to high idle which is 3700 rpm.
You said you removed cleaned the carb but not how you cleaned the carb.
You follow up with once hot it starts fine.
This tells me that the enriching mechanism is not working.
Or the fuel you are using is old and the highly volatile fractions ( also called aromatics ) needed to start a cold engine have evaporated. ( something I neglected to suggest ).
We only know what you have written.
AFAIK your carb has a pressed in brass seat & a vitton tipped needle in which case the seat can be pushed up or down a small amount in the body once it is warm to change the float level
Being it is a CV750 I made the assumption that it is the 2 barrel Keihin which are regular PIA to get parts for as they are virtually exclusive to Kohler & Honda.
I don't have may of them in the service run but there are 27 Cub cadets with CH's in them and all the twins run the same carb in downdraught orientation as distinct to the CV's which are side draught.
AS mentioned it is not uncommon to have to soak a carb in solvent cleaner for a day the follow up with and ultrasound and some times this process done multiple times before I get idle passageways clear.
Normally I would not bother with such intense cleaning but these are really expensive carbs as I am sure you are aware.
We have no idea of you level of competency unless you tell us so responses get pitched to a low level.
Sorry if you find this offensive but unless told otherwise we assume you are not proficient with small engines.
You mentioned you replaced the fuel pump but not that you had tested it and found it wanting which suggest either impatience , which is understandable if you have grass to mow or are not fully conversant with small engines.
It can be very frustrating from this end because we can not hear, see or smell the engine so we are working purely from the given text.
For example you could have a dud valve lifter that does not lift the inlet valve fully untill it gets full oil pressure, something which has a distinctive sound.
Ditto with an exhaust valve choking the engine at cranking speed
A blown head gasket
A stuck inlet valve
They all have distinctive sounds when cranking and/ or when accelerating.
If I get my jollies by demeening people I would be a Farce Book troll.
I am here to learn and to help