| Author |
Message |
    
matt chase
Member
Username: Ptzbrg
in
Registered: 5-2009
Post Number: 70
| | Posted on Sunday, July 25, 2010 - 3:29 pm: | 
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my motor on my 140 blew up.......is this possible from the starter sticking or something. I believe this was a newer motor installed as I was trying to start the block below the head broke apart...thanks for the help. |
Alan Nadeau
Member
Username: Alan
VT
Registered: 1-2006
Post Number: 1098
| | Posted on Sunday, July 25, 2010 - 6:02 pm: |
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Kind of hard to understand your post. If I'm getting it right the block cracked when you were trying to start the engine.
Were you trying to start it normally or, by chance, was it giving you problems and you tried using ether as a starting aid.
Reason I'm interested is that I bought a non-running 140 and it has a split around the block about two inches down from the top. |
matt chase
Member
Username: Ptzbrg
in
Registered: 5-2009
Post Number: 72
| | Posted on Sunday, July 25, 2010 - 6:24 pm: |
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nope had been starting fine...no ether added and had plenty of oil. But the starter had been acting up only working intermittingly. Seemed like the starter stuck or was not engaging properly. Kind of concerning though because this 140 had a newer motor in it I was told when I bought it and it does look relatively new. This make me wonder did this problem happen to the last one. It actually blew the side of the block off and cracked it into between the valves and piston also..... |
Alan Nadeau
Member
Username: Alan
VT
Registered: 1-2006
Post Number: 1099
| | Posted on Sunday, July 25, 2010 - 7:09 pm: |
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Weird! Mine cracked, or was cracked, from one valve seat down the side of the block, around the block between two cooling fins and back up to the other valve seat. PO said it had started smoking "from around the engine" so he parked it. I checked it out, no spark. I got that resolved and poured a little gas in through the plug hole and it started right up. Had smoke everywhere until the gas burned out and it quit. Pulled the head, piston was down so I could see the crack.
I can't see any reason why the starter would have anything to do with this, on your engine. Sure sucks to trash a block and have no idea why it happened though.
Best guess anybody had before, when I asked about mine, was ether damage. |
Stan Barnes
Member
Username: Stanb112
CT
Registered: 2-2002
Post Number: 2647
| | Posted on Sunday, July 25, 2010 - 8:45 pm: |
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Significantly advanced timing can put tremendous pressure on the head and block, especially when starting. It allows maximum pressure to build before the piston starts moving down in the cylinder. And the sticking starter syndrome could have actually been kickback due to advanced ignition prior to the piston reaching TDC.
Advanced timing could be caused be wearing of the point rubbing block and/or wear of the pushrod or cam lobe. So my question is, how long had it been since you checked the points gap/timing? |
matt chase
Member
Username: Ptzbrg
in
Registered: 5-2009
Post Number: 73
| | Posted on Monday, July 26, 2010 - 4:09 am: |
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I had not had the 140 long and no I had never checked the gap/timing so it could be a possible cause?? thanks |
Ken Combs
Member
Username: Kencombs
ok
Registered: 2-2008
Post Number: 62
| | Posted on Monday, July 26, 2010 - 10:26 am: |
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If By 'block below the head', you mean below the fins, it is likely another case of balance gear failure. I have a very low hour K321 with a HUGE hole from that.
IMO, it is VERY unlikely that timing would cause a block crack, the head gasket would surely fail first from a high pressure situation. |
DAVID A CALKINS
Member
Username: David_a_calkins
WA
Registered: 10-2008
Post Number: 663
| | Posted on Monday, July 26, 2010 - 6:27 pm: |
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also if you had lots of fuel leak in to the bore .that might have done this ,bad float,David |
