bench testing switch boxes?

[pcrussell50]

got a used 2.0L/150hp powerhead. it's installed but not dressed yet, and before i put the switch boxes on, i was wanting to bench test them to make sure they are ok. i have the factory manual and all it basically says is to check that the resistance between a couple of terminals (i forget which ones) is where it should be.

is it really that simple?

-peter

[Capt.Insane-o]

is it really that simple?



No.. :)

[pcrussell50]

nothing ever is, is it :)

been away for a while... any progress on the viper/115HO project?

-peter

[XstreamVking]

Well, OK. What is the procedure to check the boxes off the motor? If there is one. I have a few laying around that need checking also....

[H2Okie]

I would think testing on a bench off the motor would only show an obvious component failure such as a shorted SCR but not prove the actual fitness of the switchbox . You have low speed and high speed stator windings charging up capacitors that are discharged at the proper moment by the trigger signal . Most capacitors will weaken over time and gradually lose their ability to store a charge . The rapid charge /discharge cycling of the switch box internal components would be hard to simulate on a bench without some sort of stator signal generator .

[Go Time]

The only thing that can be bench checked is the bias ciruit. Other wise you need them on the motor and cecked with DVA to be sure.

[Capt.Insane-o]

nothing ever is, is it :)

been away for a while... any progress on the viper/115HO project?

-peter

Nope.. probably going to sell the boat and the motor will eventually find it's way on my Vector. I have another Viper to do for a member here and I have to get on with my moving schedule.