want to change lawnmower engines
#1
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want to change lawnmower engines
i would like to change engines on my lawnmower.the briggs 14.5 on a mtd(42 inch cut) is blown.i have a murray 12.5 (40 inch cut)briggs that runs well.i asked on another place and it said to take measurements of bolt patterns etc.i did that and as far as i can see everything will match up except the (i think this is what this is called)output shafts have different lenths.they are different lenths below the deck.one comes down like 4&3/4"the other 7&a half.now i put a socket up in the shaft&a bolt?nut is in there.so they do come off,right?so can i hopefully just switch them?any help here would be great.i never did this before but i'm up for the challenge!then if i can get this done i can figure out the what gets wired where.thanks
#2
if one sticks down 3-3/4" and the other 7-1/2 your pulley's wont line up this being so then NO,they won't enterchange.
You'll need to switch chranks,if you can.Or get another engine with the same lenth cranksaft.
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not sure if thats the crankshaft.what im talking about is what i thought hooked onto the crankshaft.is it called a pully.its where you put the belts on.1 for drivebelt the other below it belt to turn the bades
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reread your post.can't see the crankshaft.pulley still on both engines.the measurements i gave were for i guess the pulleys.how do you take the pulleys off?then i could see if i could change 1 pulley with the other,right?thanks
#5
You'll have to remove the pulleys with a puller first, Then check the crank length & diameter as different units use different pulley types, but inside they may be the same,, Roger
#6
Both engines should have the same bolt pattern and crankshaft dimensions. You'll need to use a 5/8" socket to remove the bolt up in the hole in the pulleys to get them off.