CDI Distributor

[katbird]

Does anyone know how to check out a cdi distributor with the rotor plate from a 76 Mercury 1150. I just bought the motor and I'm tring to go through the entire engine before spring gets here. I have already replaced the power head because of low compression and my next step is the distributor and then the carbs also can you check out a stator while off of the motor? Thanks<br />Ron Regan

 

[Clams Canino]

Re: CDI Distributor

It's easiest to static test the switchbox with the coil. <br /><br />Then if that works OK and it still won't fire it's the distributor (trigger)<br /><br />I'll post a switchbox test after ravioli and a nap - I have a splitting headace. <br /><br />-W

 

[Clams Canino]

Re: CDI Distributor

This test is for the 332-2986 switchbox used from 1967-1978 on all the<br />inlines.<br /><br />This test assumes your coil is good (most all are).<br /><br />DISCONNCT BATTERY <br /><br />1. Turn off ignion<br />2. Disconnect all 3 wires on the distributor side of the switchbox.<br />3. Remove the HV lead from the coil to the center cap (remember it unscrews<br />from cap)<br />4. Reconnect that HV center lead to the COIL side only.<br />5. Position that HV lead about about 3/8" from ground (block, shrouds etc)<br />and find a way to hold it there.<br />6. Jumber the brown and white terminals on the dist. side of the switchbox<br />together.<br /><br />RECONNECT BATTERRY<br /><br />7. Check that you have +12 V at red terminal.<br />8. Turn on ignition and verify +12V at white terminal (on red terminal side)<br />9. Touch the black terminal to ground - unit should cause spark each time<br />you touch ground.<br /><br />If that passes and it won't fire at all, suspect the trigger.<br /><br />-W