"Engine Preheat" vs. "Engine Heater"

[ajgibb2002]

--- In WanderlodgeForum@yahoogroups.com, "Bob & Carol Howald`"
wrote:
>
> Pete, The Engine pre-heat switch on the overhead panel is a
> function of the primus system. If you still have the primus system
> you would turn the engine pre-heat switch on when along with the
#1
> boiler and this would close a valve in the engine compartment that
> allow's the hot water from the boiler to preheat the engine. (very
> effective),Also at least on the 93 they have a manual valve
located
> in the engine compartment that can be turned if the electric one
> failed. The older model's had only the manual valve, I believe the
> electric overhead pre-heat was first added in the 93 model. The
> switch in the galley area with the red light is the 115volt block
> heater that's installed in the engine. On my coach in 20 degree
> weather I usually get a good clean start with this switch on for
> about 2 or 3 hours. I can hear it immediately when turning it on
and
> after a couple of hours can feel the block getting warm. I can
also
> use the primus and elec. together which really speeds heating.
Hope
> this helps.....Bob Illinois pt40 it's 80 degrees here today!!!!
> >
Hey Guys,I'm still on the steep side of the learning curve with
my '91SP. I have the overhead "Engine Preheat" on my Bird so I
guess the function was added before the 93 model. I also have the
Primus heat system. I haven't tried either of them so far; just too
many other things to deal with. I'm hoping to get some help at RIV
and RATS.
Cheers
Austin
'91SP