Hello,
Hope everyone is having a great Christmas and New Years.
My Dad just had a marina repower his Pursuit from the old 1986 350 mercruiser/alpha1 to a supposed 2001 350 mag mpi & new bravo3.
The swap seems ok, it runs and all- but the boat came home before the low oil pressure/over heat/ low outdrive lube alarm was in hand to be installed.
Was supposed to be an easy job according to the mechanic from the marina, so I volunteered to giving the install a go without much success.
After peeling back wire loom and crawling all over that engine I guess I am at the point where it appears that the wire harness on the new engine and the original harness from the boat do not have the needed wire to be just plug and play.
The elusive tan/blu I can't find.
The alarm is wired to key on 12v and a new wire run back to engine. Can not seem to find the wire to attach to from the engine harness.
I see on the gear reservoir a Blk wire & a tan/wht.
On the t-stat housing there are 2 sensors, 1 - has Tan wire only, 2nd has a plug with Blk wire & Ylw wire.
The oil switch I'm not sure which one it is, there is a sensor by the distributor with Blu wire, there is a sensor on left side of block also with Blu wire.
There are 2 unused wires I found on the harness, 1 is a single gray (is this a tach lead?)
The other is a Blu/tan some diagrams say its a oil pressure others trans temp...?
So are there any options to making this alarm function as intended? Can I splice into each wire at the sensor and attach to the alarm lead? Or am I looking for another wire to join to?
Is the ECM part of this ? I don't want to mis-wire something and cause damage
What is the sequence of events for the alarm?
Key on - alarm sounds due to low oil pressure, engine on/oil pressure comes up- alarm silent?
Alarm comes On if any of the 3 sensors trigger resulting in grounding to sound alarm?
Hoping to figure this out soon, this boat is supposed to leave Jan 20 from cool Michigan for Florida
Thanks for any direction and advise.
GTRiem
Hope everyone is having a great Christmas and New Years.
My Dad just had a marina repower his Pursuit from the old 1986 350 mercruiser/alpha1 to a supposed 2001 350 mag mpi & new bravo3.
The swap seems ok, it runs and all- but the boat came home before the low oil pressure/over heat/ low outdrive lube alarm was in hand to be installed.
Was supposed to be an easy job according to the mechanic from the marina, so I volunteered to giving the install a go without much success.
After peeling back wire loom and crawling all over that engine I guess I am at the point where it appears that the wire harness on the new engine and the original harness from the boat do not have the needed wire to be just plug and play.
The elusive tan/blu I can't find.
The alarm is wired to key on 12v and a new wire run back to engine. Can not seem to find the wire to attach to from the engine harness.
I see on the gear reservoir a Blk wire & a tan/wht.
On the t-stat housing there are 2 sensors, 1 - has Tan wire only, 2nd has a plug with Blk wire & Ylw wire.
The oil switch I'm not sure which one it is, there is a sensor by the distributor with Blu wire, there is a sensor on left side of block also with Blu wire.
There are 2 unused wires I found on the harness, 1 is a single gray (is this a tach lead?)
The other is a Blu/tan some diagrams say its a oil pressure others trans temp...?
So are there any options to making this alarm function as intended? Can I splice into each wire at the sensor and attach to the alarm lead? Or am I looking for another wire to join to?
Is the ECM part of this ? I don't want to mis-wire something and cause damage
What is the sequence of events for the alarm?
Key on - alarm sounds due to low oil pressure, engine on/oil pressure comes up- alarm silent?
Alarm comes On if any of the 3 sensors trigger resulting in grounding to sound alarm?
Hoping to figure this out soon, this boat is supposed to leave Jan 20 from cool Michigan for Florida
Thanks for any direction and advise.
GTRiem
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