Blown engine... are these models interchangeable?

Team_Dub · May 22, 2018

Craftsman LT1500 Model 247.288811 with a VERY blown 31C707-3346-G2/G6.

Had oil. No idea what happened, except that it was sudden and catastrophic. First cut after Craigslist (robbery) purchase. Can't push mow due to physical issues.

My question is will a 31R907-0007-G1 be a suitable replacement? Same crank size and keyway? Been looking but can't find the answer.

Thanks in advance.

Boobala · May 22, 2018

To me it looks like a straight-up engine CHANGE .. everything points to being a simple R&R procedure, possibly a difference in engine wires but that's an easy fix, if the R model is a good motor I'd go for it ...... keep us updated and ask for help if needed ....... :thumbsup:

https://www.partswarehouse.com/31R907-0007-G1-Briggs-and-Stratton-Engine-s/235388.htm#

Team_Dub · May 22, 2018

Boobala said:
To me it looks like a straight-up engine CHANGE .. everything points to being a simple R&R procedure, possibly a difference in engine wires but that's an easy fix, if the R model is a good motor I'd go for it ...... keep us updated and ask for help if needed ....... :thumbsup:

Thanks a ton,Boobala - that's what I was thinking and hoping to hear!

:thumbsup:

Boudreaux In Eunice La. · May 22, 2018

Team Dub if your crank and the replacement engine has the same exact measurments then you are good to go.....

I haven't looked at your specs, but the type codes are meant for color and stickers for different mowers by different brand names.... Mostly........

Crank size is your major concern Mon Ami ~!~!

Let us know ~!~!.............

Team_Dub · May 23, 2018

Boudreaux In Eunice La. said:
Team Dub if your crank and the replacement engine has the same exact measurments then you are good to go.....

I haven't looked at your specs, but the type codes are meant for color and stickers for different mowers by different brand names.... Mostly........

Crank size is your major concern Mon Ami ~!~!

Boudreaux - I was hoping an expert here would know that info and pass it along.

Still looking...

Thanks!

Team_Dub · May 23, 2018

This is from the proposed replacement:

1-Inch by 3-5/32-Inch Length Crankshaft Tapped 7-16-20-Inch

Boudreaux In Eunice La. · May 23, 2018

That's the most common length.... Now if your old one has that length which I would bet good money it does, then you are golden.......

Plus Tard Mon Ami ~!~!

bertsmobile1 · May 23, 2018

Check the plugs on the ends of the alternator.
Briggs use different colours and configurations for different capacity alternators.
If they care different ( one of the code things ) you can swap them over, just adds a little more time.

Team_Dub · May 25, 2018

Thanks for all the info!

It's ordered and will be here Tuesday.

As long as the crank is the same, all I *should* have to do is swap over the old front exhaust and possibly a little electrical tweaking.

I'm sure issues will arise and I will keep you posted!

:smile:

Boudreaux In Eunice La. · May 25, 2018

Team I thought you had a spare engine off of a used mower at your finger tips.......... I didn't know you ordered one.....

I wish I would have known..... I could have got you a better price and the same engine for your mower.........

Plus Tard Mon Ami ~!~!

Blown engine... are these models interchangeable?

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