Another generator problem? Two questions?

[Ralph L. Fullenwider]

Tom:

I have seen the temps go from 190 to about 210 F, perhaps a radiator
cleaning but that is not your problem.

When you push the start switch C relay closes completing a circuit from
12vdc to ground through normally closed contacts of the CR relay. When the
C relay pulls in, it closes a set of C relay contacts to the starter
solenoid. When the starter solenoid pulls, it closes a set of contacts to
the fuel solenoid and supplies a flash voltage to the field. also a set of
contacts close and supplies voltage to the starter motor. As the starter
motor turns over and the gen set starts the starter solenoid opens and
another set of contacts in the start solenoid continues to supply voltage
to keep the fuel solenoid energized.

It sounds like your starter solenoid is faulty. The is the one on top of
the starter motor proper. Check it with a meter, you should have 12 vdc on
the small post, if only 7 vdc on that wire then the coil of the start
solenoid is bad. Remove the small wire to the small post and check the
voltage again to prove it out. If disconnected and you have 12 vdc when the
switch is pushed, will prove the start solenoid being bad.

Safe travels,

Ralph and Charolette Fullenwider
84FC35
Duncan, Oklahoma

At 05:26 PM 5/27/2007 +0000, you wrote:
>We had an un seasonable hot weekend here and I was running the gen.
>with all three A/C's on. I have the yanmar with the 12.5kw kohler.
>Water temp. was runing slightly below 220 degrees (which I haven't
>seen that high before). Since this is my first summer with the coach,
>my first question is to the guys with yanmars. What kind of water
>temp. do you see on yours when running the gen. fully loaded on a 92
>degree day?
>
>While we were in the store for a 1/2 hr or so, came out and the gen.
>was off. None of the start switches will do anything, no clicking,
>nothing. The fuse is good. With the water temp. cooled down, I
>disconnected the hot water shutdown, still no cranking. If I hot wire
>the fuel solenoid with a jumper and jump it at the starter the gen.
>starts fine, runs and produces voltage. I just started looking at the
>schematics for the control box and I'm thinking it might be one of
>the relays in there. They're labeled CR, C, 1CR and 2CR. Am I on the
>right path here? And would anybody know which one would give me these
>symptoms? I'm pushing the limits of my abilities here!
>Thanks
>
>Tom Sorrentino
>1987 PT38
>Bedford Hills, NY
>
>