Quote:
Originally Posted by Oak
Roland is correct. The last Cub Cadet to use the Onan B48G was the early 2072 and that was ended in 1987. The Mag 20 & 18 are different. I'm thinking the cranks are different giving the 20 a longer stroke and more power. The Mag 15 & 18 are the engines that you could modify the carbs to give more power. What is the size of the pto on the engine and the size of the driven pulley on the deck? You could have a miss-match there.
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Oak, he says he has a CH18, not a Mag.
Yes, you can bring the CH18 up to 20. There is a throttle limiter on the carb. Remove it and tune it to run under the new load.
OR: I would also remove the carb and using a very small drill bit, find the size that just fits through the hole in the main jet, then use the next size bigger to drill it out. Make sure that you don't use too large of a bit. Bigger is not better. You just need to go a tiny bit larger. Then re-tune the carb.
The CH18 is not much motor for a 60" deck. But it should run it. You likely have an issue somewhere anyway. My bet is the carb is plugged up. Clean the fuel system, replace the hoses, flush the tank and disassemble and clean the carb.... while your there, drill the hole. I really kind of made this post backwards.... but I didn't want to retype it.
