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  #11  
Old 05-11-2013, 10:32 AM
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thatsmrmastercraft thatsmrmastercraft is offline
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JimN to the rescue..........
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  #12  
Old 05-11-2013, 10:36 AM
Mitchell Mitchell is offline
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Thanks for the advice. Harsh, but absolutely true. All good stuff. Headed to the dealer or a seasoned mechanic soon.
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  #13  
Old 05-11-2013, 11:52 AM
SSMoose SSMoose is offline
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Quote:
Originally Posted by Mitchell View Post
Thanks for the advice. Harsh, but absolutely true. All good stuff. Headed to the dealer or a seasoned mechanic soon.
From earlier threads I hope you are close to a Rambo location in Alabama! They must be the cats meow of a MC dealer. Good luck with this. We all want to be on the water instead of waiting in the shop.
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  #14  
Old 05-11-2013, 11:57 AM
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JimN JimN is offline
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Originally Posted by Mitchell View Post
Thanks for the advice. Harsh, but absolutely true. All good stuff. Headed to the dealer or a seasoned mechanic soon.
Any GM-trained mechanic should be able to solve this. ANY of them- it's a GM-based system, from the ground up. The only thing they wouldn't be familiar with is the fresh water cooling system.
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  #15  
Old 05-11-2013, 04:48 PM
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Jerseydave Jerseydave is offline
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All good advise so far. Here's what I would do (in order)

1. Make sure knock sensor is connected, check all sensor connections
2. Clean and tighten battery cables at battery and at engine block, check cable to starter as well
3. Double-check plug wires are going to the proper plugs
4. Fuel pressure test
5. Add seafoam to fuel and water test, see if anything changes
6. ?
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  #16  
Old 05-11-2013, 05:50 PM
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mikeg205 mikeg205 is offline
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Quote:
Originally Posted by JimN View Post
Stop replacing parts until you know what's wrong!

This is going to seem harsh, but you need to think about this, not guess. It's not going to magically tell you what's wrong. You'll only find this by testing things. If you have no idea how to do the testing, take it to someone who does.

If it ran well last year, something changed and it will be possible to verify.

Who winterized it? What did they do? Is the flame arrestor clean? Does it want to run if you open the throttle a little?


What is your fuel pressure?

Did you take a fuel sample? You can do this when you check the pressure.

Did you test for spark?

Did you check your battery terminals? Yes, they can cause this kind of thing if not clean and tight.
Jim - all good questions...
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  #17  
Old 05-11-2013, 05:51 PM
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mikeg205 mikeg205 is offline
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my bet is fuel filter and or fuel pump on this baby... but do JimN's stuff first.
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  #18  
Old 05-11-2013, 08:37 PM
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Originally Posted by mikeg205 View Post
my bet is fuel filter and or fuel pump on this baby... but do JimN's stuff first.
Add JerseyDave's recommendation about the knock sensor wire, too.

I would also check the timing- if it never advances more than 10-15BTDC, check the knock sensor and the wire. At WOT, the engine should be hitting about 40 of total advance but if the knock sensor is sending knock signal and you just can't hear any, look into that. If you run at about 20MPH and hit a motor mount with a hammer and see no change in the timing advance, tap on the sensor and see if that makes it retard. If not, the sensor could be bad.
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