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Discussion Starter #1
I had a crank seal go out so I sent motor off and had a new crank and seals installed and a complete rebuild. Put the new motor back in sled and it blows fuel and oil out exhaust. The engine will only rev around 7200 and lacks power. It surges like its trying to run right but won't. I have been threw the carbs a dozen times and even took to dealer and they went threw carbs. I am totally lost on what to look at next
 

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re-check compression?

Raves stuck closed?
 

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I rechecked compression its a little over 150 on each cylinder and checked the rave valves and they r free as can be and seem to be working as they should. Is there anything else you can think of I'm at a lost here and don't know were else to look
 

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weak or missing spark? Try unscrewing the spark plug caps, cut off about 1/8" of the wire and then screw the spark plug cap back on. If both ends of the spark plug wire can be unscrewed, do the same to the coil side.

 
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