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Old 04-18-2010, 09:28 PM
dubaholic2 dubaholic2 is offline
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mower dies when blades are engaged

scag sw36-13ka, kawasaki fc420v. just got it running and tried to use it for the first time and when i went to engage the blades the mower dies. no matter what i do everytime i engage the blades it dies. i figure there must be a safety or something thats not working correctly, but im not sure where it would be. if anyone can help with this i would greatly appreciate it. thanks, ian
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Old 04-18-2010, 10:04 PM
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DT Lawn Care DT Lawn Care is offline
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Quote:
Originally Posted by dubaholic2 View Post
scag sw36-13ka, kawasaki fc420v. just got it running and tried to use it for the first time and when i went to engage the blades the mower dies. no matter what i do everytime i engage the blades it dies. i figure there must be a safety or something thats not working correctly, but im not sure where it would be. if anyone can help with this i would greatly appreciate it. thanks, ian
Try choking it before and as you engage the blades. That will pretty much rule out any shot of engine failure. Electric or manual engage? Check your operator presence safety as well.
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Old 04-19-2010, 12:10 AM
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This had happend on my deere. There was a bearing that was locked up so it would die. Can you spin the blades manual?
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Old 04-19-2010, 01:45 AM
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DaughtryLC DaughtryLC is offline
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i have an older toro that I have to half choke it everytime. Just one of those things
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Old 04-19-2010, 05:50 PM
Outdoor_Maintenance_2010 Outdoor_Maintenance_2010 is offline
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hope you dont have the engine running at high rpm's when you do so
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Old 04-19-2010, 10:33 PM
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Diesel59 Diesel59 is offline
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could be the safety switch on the handles.... they go bad from time to time. That is really the only thing that will kill the blades when you try and engage them.
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Old 04-20-2010, 09:37 PM
dubaholic2 dubaholic2 is offline
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the safety swith on the handles was bypassed long before i got the mower. as for the pulleys, i cant turn everything easily by hand. i have the mower running at full throttle when engaging the blades. should i not do this? i would imagine it would need the power to take the extra drag of the blades engaging. if im wrong please correct me and explain this to me. thanks, ian
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Old 04-21-2010, 03:58 PM
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piston slapper piston slapper is offline
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Applying the choke is a good way to troubleshoot . If you carb is running lean,(partially clogged) you wont have enough gas for the engine to handle the load of engaging the blades.

Top governed speed is ok to engage the blades, I dont think you're going to hurt the belts.
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Old 04-21-2010, 05:03 PM
44DCNF 44DCNF is offline
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Any wires going to the trans? If so remove the switch they go to and see if the ball on the end of it is free moving, or rusted or gone altogether. Both this and the one on the blade linkage work in concert. The trans switches tend to rust sitting on top of the trans and taking in water. They can eventually come apart when you shift into gear; sounds like your situation when you went to move it from behind the trailer.
A blown head gasket or loose spark plug will cause an engine to suffer under load too.
Synch your choke and throttle adjustment, if applicable.
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Old 04-21-2010, 05:48 PM
44DCNF 44DCNF is offline
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Originally Posted by 44DCNF View Post
Any wires going to the trans? If so remove the switch they go to and see if the ball on the end of it is free moving, or rusted or gone altogether. Both this and the one on the blade linkage work in concert. The trans switches tend to rust sitting on top of the trans and taking in water. They can eventually come apart when you shift into gear; sounds like your situation when you went to move it from behind the trailer.
A blown head gasket or loose spark plug will cause an engine to suffer under load too.
Synch your choke and throttle adjustment, if applicable.
After rethinking this, it seems a failed neutral switch would prevent it from starting altogether, not kill it when blades engage. Might be worth a look though.
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