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Briggs Stratton XT 1750 upgrade from Kohler Courage 15 SV470

#1

R

rakellermann

Hello,
First time posting, hoping to get answer. I have a Toro SS 3200, Kohler Courage 15 SV 470 model finally died out. Purchased a Briggs N Stratton XT 1750. Issue is the engine plug. BS 1750 has three, single red and dual connector with black and gray, I know the Red for power and the black is for ground and gray is for carb solenoid. The old Kohler has a 6 prong plug, but only 4 are used, red/white/violet and orange jump wire from violet.
Is there an adapter I need to purchase or can someone tell me which wires I am to splice into the new engine?
RK


#2

B

bertsmobile1

If you have the old engine there in front of you take the blower housing of and check where the wires go the connect accordingly
The only trick is the violet wire which is the trigger for the starter solenoid
You B & S engine requires an external starting solenoid so you will need one of those plus another red power cable to run from the solenoid to the starter motor.
The original battery cable , plus the small red wire will need to be connected to the new solenoid
The red wire ON THE STARTER is to power feed to the mower
The red wire on the engine is the power return to charge the battery
t can also go to the live terminal on the starter solenoid
These things are never as simple as they look


#3

ILENGINE

ILENGINE

On the old Kohler the red is the fuel solenoid. white is the kill wire and the purple/violet is the charge wire coming from the voltage regulator. On the briggs the red would be the charge wire for the battery, black is kill, and grey is fuel solenoid.

And to @bertsmobile1 The SV or single cylinder courage doesn't have the solenoid on the starter so that part of the Kohler engine wiring containing the solenoid actuator wire isn't there. And to @rakellermann you will need to look at the 6 pin terminal connector on the mower side of the connection to determine what goes to were and how it is wired. How many wires does the mower 6 pin connector have. It has 3 then things are fairly simple.


#4

StarTech

StarTech

I see Briggs is getting stupid again. The use of model series names can be confusing to us that goes by actual model numbers. All they was to use Layman's term moeld names just to make out they created a new series of engines.

Here I find no XT 1750 but do find a Briggs reference to a EX 1750 engine which be the 31R9 model series that we are familiar with. And here something that we may not know about it. They market the EX1750 as 10.5 -19 gross hp but it is rated at 17.5 gross hp.


#5

R

rakellermann

rakellermann said:
Hello,
First time posting, hoping to get answer. I have a Toro SS 3200, Kohler Courage 15 SV 470 model finally died out. Purchased a Briggs N Stratton XT 1750. Issue is the engine plug. BS 1750 has three, single red and dual connector with black and gray, I know the Red for power and the black is for ground and gray is for carb solenoid. The old Kohler has a 6 prong plug, but only 4 are used, red/white/violet and orange jump wire from violet.
Is there an adapter I need to purchase or can someone tell me which wires I am to splice into the new engine?
RK
Click to expand...
Thank you for the reply, will try out suggestions and correct never as easy as it seems.


#6

StarTech

StarTech

There is really no substitute for experience. Even us professionals have to do our homework when changing engines.

Here I spent time and money learning how to professionally wire up these engines. Otherwords I do little splicing but instead work the connectors using now pins and sockets.

One my pet peeves is the lack of info from these OEMs as the wiring color coding they use which can change from time to time. What we depend on is each other experience when it comes to new re-power projects. Sometimes we have to pull the engine's shrouds and hand trace the current wires to what they are attached to.

It would so much simpler if each OEM develop and publish a standardize wiring system. I recently had to re-wire a JD mower due mice damage. Even their service manual wiring color codes didn't match what was in front. Luckily they also use a number system which help to get things properly wired.

At least the OP case here we are dealing with few wires and not over 100 wires of the same color with only numbers printed on them.


#7

R

rakellermann

ILENGINE said:
On the old Kohler the red is the fuel solenoid. white is the kill wire and the purple/violet is the charge wire coming from the voltage regulator. On the briggs the red would be the charge wire for the battery, black is kill, and grey is fuel solenoid.

And to @bertsmobile1 The SV or single cylinder courage doesn't have the solenoid on the starter so that part of the Kohler engine wiring containing the solenoid actuator wire isn't there. And to @rakellermann you will need to look at the 6 pin terminal connector on the mower side of the connection to determine what goes to were and how it is wired. How many wires does the mower 6 pin connector have. It has 3 then things are fairly simple.
Click to expand...
ON the mower side, there are actually 4 wires, one looks pink, (thinking it was red, based on engine side of plug), white, and three purple wires, yet two are in one prong. I am thinking the three would be tied together, as on engine side, there is a jumper for the purple wires.

So, thinking if I take the engine plug of old into mower plug, cut the wires and connect the lone red wire from new to the purple of old, black wire from new to the white of old, and grey from new to the red of old wire. Am I correct?


#8

R

rakellermann

StarTech said:
I see Briggs is getting stupid again. The use of model series names can be confusing to us that goes by actual model numbers. All they was to use Layman's term moeld names just to make out they created a new series of engines.

Here I find no XT 1750 but do find a Briggs reference to a EX 1750 engine which be the 31R9 model series that we are familiar with. And here something that we may not know about it. They market the EX1750 as 10.5 -19 gross hp but it is rated at 17.5 gross hp.
Click to expand...
Correct, I thought odd when I ordered it was listed as a 31R907, yet when received seen the label XT 1750.


#9

B

bertsmobile1

rakellermann said:
ON the mower side, there are actually 4 wires, one looks pink, (thinking it was red, based on engine side of plug), white, and three purple wires, yet two are in one prong. I am thinking the three would be tied together, as on engine side, there is a jumper for the purple wires.

So, thinking if I take the engine plug of old into mower plug, cut the wires and connect the lone red wire from new to the purple of old, black wire from new to the white of old, and grey from new to the red of old wire. Am I correct?
Click to expand...
This is why I said to remove both blower housings and trace the wires to see where they connect to.
This is what I do because I never trust wire colours as some times they are wrong and some times ( actually more times ) my memory is wrong
Ie violet for charging wire & blue for starting solenoid


#10

Scrubcadet10

Scrubcadet10

StarTech said:
There is really no substitute for experience. Even us professionals have to do our homework when changing engines.

Here I spent time and money learning how to professionally wire up these engines. Otherwords I do little splicing but instead work the connectors using now pins and sockets.

One my pet peeves is the lack of info from these OEMs as the wiring color coding they use which can change from time to time. What we depend on is each other experience when it comes to new re-power projects. Sometimes we have to pull the engine's shrouds and hand trace the current wires to what they are attached to.

It would so much simpler if each OEM develop and publish a standardize wiring system. I recently had to re-wire a JD mower due mice damage. Even their service manual wiring color codes didn't match what was in front. Luckily they also use a number system which help to get things properly wired.

At least the OP case here we are dealing with few wires and not over 100 wires of the same color with only numbers printed on them.
Click to expand...
I worked on a Lincoln welder/generator last year, mice chewed up a ton of wires... I just about had a heart attack when i saw all of the wires were white....
Only with some more investigating did i see the wires were numbered. that felt like a heavy weight lifted off of me.🤣


#11

B

bertsmobile1

believe it or not at one time the Australian government wanted car makers to use only black or red wires in the looms to deter people stealing cars by hot wiring them
Thankfully every car company told them that they would withdraw from the Australian market if that became part of the ADR so that smart idea ended up where it belonged .


#12

R

rakellermann

rakellermann said:
ON the mower side, there are actually 4 wires, one looks pink, (thinking it was red, based on engine side of plug), white, and three purple wires, yet two are in one prong. I am thinking the three would be tied together, as on engine side, there is a jumper for the purple wires.

So, thinking if I take the engine plug of old into mower plug, cut the wires and connect the lone red wire from new to the purple of old, black wire from new to the white of old, and grey from new to the red of old wire. Am I correct?
Click to expand...
Hello ALL,
Swapped motor and spliced according, motor turned and really struggled to get gas, took air filter off, placed hand and it pulled fuel as could see in fuel filter. Seems to run but haven't tested fully under load yet, replacing belts. Question I now have, Kohler Courage had a vacuum type fuel pump, this BS motor does NOT, yet has fuel solenoid. Am I going to have to retrofit to pull fuel? I noticed it did struggle at times, like not getting enough fuel.


#13

StarTech

StarTech

Well you are going to need a fuel pump as the fuel is being pull the fuel via the top side and no amount of gravity is going to push fuel uphill. Your lucky that the Briggs can have the dipstick tube changed out so a vacuum can be added. Use 697085 and the Kohler should had the hockey puck fuel pump so you can reuse it.

9:1 is your fuel pick up. PN 121-0793.

1685306375217.png
Fuel Pickup looks like this.
1685307089545.png


#14

StarTech

StarTech

And I just thought something else that going to be a problem. The carburetor is setup for gravity fed system and the fuel pump will overload the float needle valve so t hat would also need changing out,


#15

StarTech

StarTech

bertsmobile1 said:
believe it or not at one time the Australian government wanted car makers to use only black or red wires in the looms to deter people stealing cars by hot wiring them
Thankfully every car company told them that they would withdraw from the Australian market if that became part of the ADR so that smart idea ended up where it belonged .
Click to expand...
Well two might have been better than some the harnesses I use to deal where all the wires were one color (White). Definitely had to have the wiring schematics for those systems.


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