chester330
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Kawasaki FH721V AS15 25 HP ENGINE
Kawasaki FH721V AS15 25 HP ENGINE
UPPER OILS SEAL LEAKING - REPLACED AND LEAKING AGAIN AFTER 10 MIN
I GUESS FROM THE VIBRATION FROM CRANKSHAFT
I AM LOOKING ON THE PARTS DIAGRAM AND I DONT SEE ANY REPLACEMENT FOR THE BEARINGS OR SLEEVE
ANY HELP WOULD BE APPRECIATED
THANKS
CHESTER
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SRTsFZ6
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Re: Kawasaki FH721V AS15 25 HP ENGINE
2024/01/12 15:09:43
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chester330
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Re: Kawasaki FH721V AS15 25 HP ENGINE
2024/01/12 17:41:27
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Any suggestions on how I should fix it
Thanks
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SRTsFZ6
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Re: Kawasaki FH721V AS15 25 HP ENGINE
2024/01/13 08:15:21
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Can you feel any back and forth movement with the crankshaft? Is there (should be) a hole for oil to be pumped just below the seal/or at the crankshaft itself. If the hole is visible, and the seal set too deep, it can stop the oil flow and burn up the seal.. . .
post edited by SRTsFZ6 - 2024/01/13 08:19:37
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chester330
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Re: Kawasaki FH721V AS15 25 HP ENGINE
2024/01/13 09:14:53
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I replaced the seal . Put it back together
Started up and noted the flywheel had a wobble and vibration
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chester330
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Re: Kawasaki FH721V AS15 25 HP ENGINE
2024/01/13 09:52:26
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I put the new oil seal in ,put it back together and started it that's when I noticed vibration and the flywheel had a wobble to it
Could the flywheel have been put back on wrong ? If not then it must be the crank shaft bearing
How can you tell if the bearing is bad on the crank
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chester330
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Re: Kawasaki FH721V AS15 25 HP ENGINE
2024/01/13 10:27:20
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SRTsFZ6
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Re: Kawasaki FH721V AS15 25 HP ENGINE
2024/01/13 11:06:43
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The flywheel should be tapered and fit "square" / flat with no wobble.
Can you push the flywheel BACK AND FORTH, even a little, with a pry bar?
Was there any event (machine striking something, etc) just before issues arose?
And the block IS the bearing looking at the parts diagram.
Thinking about it, a worn block would allow the flywheel to have the above mentioned play.
For it to wobble, it's either not seated, the crankshaft bent, etc..
.
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chester330
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Re: Kawasaki FH721V AS15 25 HP ENGINE
2024/01/13 14:05:27
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There is wobble on the crank shaft
Have trouble uploading video
But there is some wobble
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SRTsFZ6
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Re: Kawasaki FH721V AS15 25 HP ENGINE
2024/01/13 14:53:31
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If the crank is wobbling, and there is no play(between the crank and case) it sounds like the crankshaft itself is bent.
Did it hit any objects or stop suddenly??
.
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SRTsFZ6
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Re: Kawasaki FH721V AS15 25 HP ENGINE
2024/01/13 14:55:37
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SRTsFZ6
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Re: Kawasaki FH721V AS15 25 HP ENGINE
2024/01/13 14:56:44
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You should be able to make a You Tube video and post it..
.
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chester330
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Re: Kawasaki FH721V AS15 25 HP ENGINE
2024/01/13 16:42:01
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SRTsFZ6
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Re: Kawasaki FH721V AS15 25 HP ENGINE
2024/01/14 08:34:02
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chester330
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Re: Kawasaki FH721V AS15 25 HP ENGINE
2024/01/14 10:46:14
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chester330
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Re: Kawasaki FH721V AS15 25 HP ENGINE
2024/01/14 18:40:33
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Still can't upload video
Thanks
Chet
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SRTsFZ6
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Re: Kawasaki FH721V AS15 25 HP ENGINE
2024/01/15 08:20:20
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Can you push the flywheel BACK AND FORTH, even a little, with a pry bar?
Was there any event (machine striking something, etc) just before issues arose?
A worn block would allow the flywheel to have the above mentioned play.
For it to wobble, it's either not seated, the crankshaft bent, etc..
With the flywheel off, clamp a steel coat hanger to the block. Set the end of it
to JUST TOUCHING the end of the crankshaft (smooth surface). Now, from the other end, rotate
the crank looking for "run out" (AKA a bent crankshaft).
.
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chester330
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Re: Kawasaki FH721V AS15 25 HP ENGINE
2024/01/15 15:28:55
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I couldn't upload any pictures
I removed the engine today and took it apart
I know the bearing or sleeve is worn lot of play.
How can I make sure the crankshaft is good?
And where can I get the bearing or sleeve
Thanks for all of your help
When I go to upload it say MP4 no supported
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SRTsFZ6
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Re: Kawasaki FH721V AS15 25 HP ENGINE
2024/01/15 17:39:25
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Use this app, free and works great: https://postimg.cc/files The block, as noted earlier, doesn't have a separate bearing/sleeve. The crank, being steel, is likely ok, a visual inspection for grooves marks etc would tell about it's condition. Measuring the crank journal vs the block opening should show the difference between them I have a site that posts about everything but the clearance you want to know. In general, .002" to .003" is acceptable. Its sounds like yours is way beyond that.. Can you measure accurately and post? .
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SRTsFZ6
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Re: Kawasaki FH721V AS15 25 HP ENGINE
2024/01/15 17:39:35
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Use this app, free and works great: https://postimg.cc/files The block, as noted earlier, doesn't have a separate bearing/sleeve. The crank, being steel, is likely ok, a visual inspection for grooves marks etc would tell about it's condition. Measuring the crank journal vs the block opening should show the difference between them I have a site that posts about everything but the clearance you want to know. In general, .002" to .003" is acceptable. Its sounds like yours is way beyond that.. Can you measure accurately and post? .
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