Cannibal not starting

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ABM-CANNIBAL · #21 Post by **ABM-CANNIBAL** » Tue Aug 28, 2007 6:54 pm

So guys, what is my next option. I really want to get this running. Just to let you know that this motor was recently rebuild completly. Probably only 20-30 hours on it. It has a timbo stroker crank, cp pistons & ported by timbo. It also has a fixed decomp from wistech a few years ago.

cannondale27 · #22 Post by **cannondale27** » Tue Aug 28, 2007 9:36 pm

You need to do a compression test.Only other option I see is to remove motor and start with checking valve clearance etc.

ABM-CANNIBAL · #23 Post by **ABM-CANNIBAL** » Tue Aug 28, 2007 9:44 pm

How will the compression test work if when I hold the throttle open it barely turns the motor over? What should the psi look like on a 13:1 piston?

cannondale27 · #24 Post by **cannondale27** » Tue Aug 28, 2007 9:49 pm

80-120psi. If motor is barely turning over it sure sounds like your decomp is stuckopen.If thats the case you will have over 200psi.Very hard on one-way bearing and starter.Do the wires get hot when your trying to crank it over?

ABM-CANNIBAL · #25 Post by **ABM-CANNIBAL** » Tue Aug 28, 2007 9:53 pm

Which wires? Starter or battery? Not sure on either but I can check.

cannondale27 · #26 Post by **cannondale27** » Tue Aug 28, 2007 9:55 pm

To the starter.The big red one.Just interested to be sure it is high compression causing this slow cranking and not something else like a bad ground.

ABM-CANNIBAL · #27 Post by **ABM-CANNIBAL** » Tue Aug 28, 2007 9:59 pm

Remember that the slow cranking is only when given throttle. It cranks fine when no throttle is given.

cannondale27 · #28 Post by **cannondale27** » Tue Aug 28, 2007 10:02 pm

That extra air ups the compression.

ABM-CANNIBAL · #29 Post by **ABM-CANNIBAL** » Tue Aug 28, 2007 10:07 pm

I will check compression this week and also check the wire. What is involved in replacing the decomp. I looked for it in the atk diagrams but couldn't locate it. Is it in the head or case?

cannondale27 · #30 Post by **cannondale27** » Tue Aug 28, 2007 10:15 pm

Its in the head on the exhaustcam.