Rstacy
Seaman Apprentice
- Joined
- Sep 22, 2017
- Messages
- 33
I have a 78 Mercury 900 that was running great but putting out way too much voltage for any of today's add on electronics. It had the original rectifier only configuration.
After some research I purchased the more expensive CDI regulator/rectifier over the cheaper solutions.
The CDI unit did exactly what it was supposed to do. Charge voltage was good.
Unfortunately the engine doesn't like it. I lost about 900 rpms off the top end and at WOT the engine is surging.
I installed the original rectifier and all was good again as far as engine performance goes.
Is it possible that the ignition module needs that higher voltage to fire the plugs at WOT?
If so, any thoughts on how to control the charge voltage without hurting engine performance?
After some research I purchased the more expensive CDI regulator/rectifier over the cheaper solutions.
The CDI unit did exactly what it was supposed to do. Charge voltage was good.
Unfortunately the engine doesn't like it. I lost about 900 rpms off the top end and at WOT the engine is surging.
I installed the original rectifier and all was good again as far as engine performance goes.
Is it possible that the ignition module needs that higher voltage to fire the plugs at WOT?
If so, any thoughts on how to control the charge voltage without hurting engine performance?