can i swap out the engine on my 21hp LA130 with an engine from a 20hp L120

[Bocephus]

i lost compression in one hole on my LA130's 21hp B&S. i found an engine from a L120 (20 horse twin B&S) that is fairly close to me. can anyone tell me if this would be a "direct" swap?

 

[pile81]

The hole patterns are all the same on the frame and engine, it should be a direct swap.....

 

[Bocephus]

are you 100% sure? i appreciate the comment, but dont want to spend $250 on an engine that wont fit. crank shaft size and length is all the same as well? (i guess as long as its a similar pulley that will work work the belt, i wouldnt even have to swap them)

 

[pile81]

I can find out for sure tomorrow if u aren't in a super hurry, off the top of my head I think they are identical just horsepower differences

 

[Bocephus]

that would be great! its located about 40 miles from me, and i plan to go look at it tomorrow evening after work.

 

[pile81]

Somebody will prolly reply before then I'm sure, if not ill let you know for sure tomorrow

 

[mullins87]

If those engines are different I would be very surprised. If the mounting holes are different, just drill new holes in the frame to match the new engine. If the throttle, choke, wiring and fuel lines are different, none of that is very difficult to work around. In case the shafts are different, make sure you get the pulleys that came with that engine. Also, get the exhaust system that came with it to make sure you will have a working muffler. I really don't think the pulleys and exhaust are different, but I could be wrong.

 

[pile81]

Bolts right in harness, and crank is the same, you'll have to change throttle cable and choke cable

 

[Bocephus]

THANKS guys! what a nice tool this internet is to have haha. the guy im getting the engine from has the complete mower. it got backed into and halfways drove over. the rear end is totaled, but everything up front is still good. im hoping he will let me take all the parts i need. or hell, maybe offer him a little more money and take the whole L120 home. thanks again guys

 

[PJ]

i lost compression in one hole on my LA130's 21hp B&S. i found an engine from a L120 (20 horse twin B&S) that is fairly close to me. can anyone tell me if this would be a "direct" swap?

i do not see a problem with what you want to do. If I am not mistaken it was done before.look at the configuration between the two engines if it is the same small task to do it.

good luck
PJ