cub carb and engine follow up ??s

[alan]

brought home a 49 cub/w belly mower this spring and with some help from this board, it now does a serviceable job of mowing. i have two current questions:
1. when i bought it, it smoked a little -- the oil was very thin and black . i changed oil and filter, and with the fresh 30wt, smoking stopped. but with-in a few hours of use, it again started smoking and oil is very thin and black again.....any ideas on the cause of this?? there does not appear to be any oil in the water, and it doesn't seem to use water......

2. while it now has much better power than when i got it, its still not quite right. while i have cleaned the carb that's on it, i'm suspecting the carb is still not where it should be. i have an extra carb that i'd like to get rebuilt. since i really don't have time to mess with it right now, i'm looking for a good vendor to have the extra carb rebuilt....can you reccomend anyone??
thanks -- alan

[parts man]

Alan, if you have the 6touch control lift, check your reservoir level. If it's down, the hydraulic pump is leaking hydraulic oil into the engine.
If that doesn't seem to be the case, then it is most likely getting more gas than it can burn, and the excess is washing by the pistons and contaminating the oil. Either case is BAD for your crank bearings and should be repaired ASAP.

[alan]

thanks -- i do have touch control, and it does leak, but i thought the leak was external around the main shaft, but maybe not all of it....i was planning on tackling it next winter, after mowing season. maybe i'll have to change oil more often to nurse me thru the summer....what am i looking at -- seals, gaskets, o rings or more?? alan