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Old 01-06-2013, 10:29 PM   #1 (permalink)
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'72 Yamaha sl338c starting problems
Hey everyone! I'm Rick! new to the forum just bout my first sled today but having issues starting I and getting fuel air and spark the spark on one cylinder is a little weak but still strong enough that it should at least try to fire it has compression on the top end. Any ideas what it could be?'72 Yamaha sl338c starting problems-imageuploadedbysm-free1357532982.610430.jpg


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Old 01-06-2013, 10:59 PM   #2 (permalink)
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Start with new plugs!
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Old 01-06-2013, 11:01 PM   #3 (permalink)
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Just put new plugs in


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Old 01-06-2013, 11:30 PM   #4 (permalink)
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Are the wire end caps good and tight on the plugs and the wires?
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'90 Wildcat Project in progress.

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1980 Indy Trail 440 (for sale)
1980 AC Pantera (donor engine to the 90 wildcat)


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Old 01-06-2013, 11:35 PM   #5 (permalink)
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Bought!


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Old 01-06-2013, 11:36 PM   #6 (permalink)
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Ya I have spark when the plugs are out of the cylinders


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Old 01-06-2013, 11:37 PM   #7 (permalink)
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Compression test yet?
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'93 Wildcat 700EFI
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'90 Wildcat Project in progress.

Vintage (sorta)
1980 Indy Trail 440 (for sale)
1980 AC Pantera (donor engine to the 90 wildcat)


http://www.dcdrifters.net/


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Old 01-06-2013, 11:40 PM   #8 (permalink)
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Not yet I did old school way and put my thumb over the plug hole and was pushing my thumb off! But I don't have the numbers on what the compression should be


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Old 01-06-2013, 11:54 PM   #9 (permalink)
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Well, that will tell a lot.
Also, the weak spark can often be the external coil is going out.
Another thing to check is to pull the flywheel and make sure that there is no rust on the magnets and coil ends.
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'93 Wildcat 700EFI
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'90 Wildcat Project in progress.

Vintage (sorta)
1980 Indy Trail 440 (for sale)
1980 AC Pantera (donor engine to the 90 wildcat)


http://www.dcdrifters.net/


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http://www.masonicdryden472.org/

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Old 01-07-2013, 12:00 AM   #10 (permalink)
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Ya that's my next task for tomorrow I want it fixed before the snow melts


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Old 01-07-2013, 12:07 AM   #11 (permalink)
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Thanks for the help ill update tomorrow


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Old 01-07-2013, 05:36 PM   #12 (permalink)
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Hey problem is worse then I thought the whole motor is filled with fluids


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