I have a homemade splitter with some sort of 10 hp engine on it. The engine quite on me while using it and hasn't had spark since. The small engine repair guy tested the ignition system and feels that it is the coil that is bad. Unfortunately this engine is probably 30 years old and the engine #s don't match up with any currently available parts. So after taking this engine to 3 places and getting the same shoulder shrug I decided to just get a new engine. I am looking for some advice on size and type. My splitter has a 30" cylinder with a 3" bore and a Vickers v20 pump that is rated at 13 gpm at 3600 rpm. I am replacing an old horizontal shaft 10 hp engine with a 1" shaft. Are newer engines going to have more power than an older engine with the same HP rating? With this cylinder and pump setup do I need a 10hp or would 8 or 6.5 do? Is brand preference like the whole ford and chevy debate or are their actual differences? Would a snowblower engine work just as good as an all purpose replacement engine? If the shaft on the new engine is 3/4" does it matter? If the pully set on the pump is seperate from the engine. Thank you for your time in this matter. I have been dicking around this thing for 5 weeks now and I have 4 cord of bucked round to split and stack. I just want it to work everytime I need it.