Originally Posted by boeing1
pressing the preheat button should not start the electric fuel pump
, it should come on when the key is on. preheat button should only heat the glow plugs, most engine
require pressing both the glow plug
and the start button to start the engine
well that is how most of the boats I have worked operate.
Please be aware that many engines are wired to have the fuel pump
ONLY run when the glow plugs are ON or the oil
pressure is "made."
It requires a bypass to get the fuel pump to work when bleeding, and, IMHO, is a stupid way to wire the system, but that is what many folks have.
Mine is like yours on the fuel pump. We discussed it at great length on our C34 forum, since our Mark II boats with newer M35 engines came this way, while the older boats like mine, are simpler with an always-on fuel pump through the ignition switch, not the glow plugs.
CRITICAL UPGRADES - DO THESE OR ELSE!!!
However, on mine, the very LAST thing to do is to have to push BOTH the start and glow plugs at the same time. Makes NO sense. No reason to have both draw. I glow plug
release then hit start. I installed a solenoid for the glow plugs, which come pre-installed on newer engines.
There are all sorts of different ways to do things, like it or not.
The trick is to learn what you have, how it works, and what to do with it.