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post #1 of 12 (permalink) Old 03-31-2019, 03:40 PM Thread Starter
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660 gas supply

Iím sure this is the case for all rhino owners but has anyone watched the fuel siphon back down into the tank after you turn the rhino off? Seems like it might be pulling some fuel out of the carb as well, maybe hard start issue?


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post #2 of 12 (permalink) Old 03-31-2019, 04:01 PM
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Originally Posted by RhinoBear View Post
Iím sure this is the case for all rhino owners but has anyone watched the fuel siphon back down into the tank after you turn the rhino off? Seems like it might be pulling some fuel out of the carb as well, maybe hard start issue?


Could very well be one of the issues for 660 owners. As the 660 ages we see more and more issues with carbs & fuel supply. Carbs eventually succumb to our wonderful ethanol fuel and fuel pumps just plain wear out in time. Not having a carburetor model I'm not sure why there are so many issues with carbs loosing their prime but most folks get around it by installing a marine primer bulb in the fuel line between the tank the carb.


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post #3 of 12 (permalink) Old 03-31-2019, 04:35 PM Thread Starter
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Thanks sandbuster, I thought about doing that but I guess it would have to be routed in a way you could get to it without removing the center console. But I can literally hear and see (clear fuel lines) the fuel being siphoned back to the tank. Makes me wonder how much it sucks out of the bowl. I wonder if anyone has put in something like a foot valve or check valve.


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post #4 of 12 (permalink) Old 03-31-2019, 05:03 PM
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Thanks sandbuster, I thought about doing that but I guess it would have to be routed in a way you could get to it without removing the center console. But I can literally hear and see (clear fuel lines) the fuel being siphoned back to the tank. Makes me wonder how much it sucks out of the bowl. I wonder if anyone has put in something like a foot valve or check valve.


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Check valve? Why not - that's a pretty good idea! Wonder if anyone here has tried that in the past? The only possible side effect could be vapor lock on ?hot days but may be worth a try!
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post #5 of 12 (permalink) Old 03-31-2019, 05:18 PM Thread Starter
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I used to have a bayliner trophy I/O that was supposed to have a check valve inline to the carb but with it in it would not push enough fuel. It wouldnít start so I took it out and it started and ran great and didnít siphon back! I mean it would after months but never had a problem. I wonder if they make an in-line barb fitting on both sides type check valve. I also did the weller hvlp pump set up so I think It could push through a check.


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post #6 of 12 (permalink) Old 03-31-2019, 07:33 PM
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I used to have a bayliner trophy I/O that was supposed to have a check valve inline to the carb but with it in it would not push enough fuel. It wouldnít start so I took it out and it started and ran great and didnít siphon back! I mean it would after months but never had a problem. I wonder if they make an in-line barb fitting on both sides type check valve. I also did the weller hvlp pump set up so I think It could push through a check.


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Take a look at this: https://www.amazon.com/Return-Check-...-2-spons&psc=1
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post #7 of 12 (permalink) Old 04-01-2019, 03:09 AM Thread Starter
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Wow that is awesome! Thanks for looking for it. Thatís definitely worth trying for the price. I want to say Iíve seen foot valves that also the pick ups in the tank as well. How do you like the 700? Iíve kicked around the idea of selling this thing and going to the 700.


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post #8 of 12 (permalink) Old 04-01-2019, 04:55 AM
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Wow that is awesome! Thanks for looking for it. That’s definitely worth trying for the price. I want to say I’ve seen foot valves that also the pick ups in the tank as well. How do you like the 700? I’ve kicked around the idea of selling this thing and going to the 700.


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The 700 is solid which holds true for almost anything that Yamaha puts it name to. No chokes to worry about, a little more power and like the 660 - just plain fun. I traded a 660 Griz for the Rhino (+$) - I miss the Griz which is an awesome machine but I'm a tinkerer and the Griz is limited to what you can add on - my Rhino is unique thanks to 4 years of adding and changing this an that. It still looks fairly stock on the outside but the ****pit is way different from what you normally see. WOW! Used a term to describe the area of a jet that the pilot sits in and our politically correct web software determined it was a "bad" word - too funny this world we live in today!

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post #9 of 12 (permalink) Old 04-02-2019, 09:21 AM
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I just put a check valve on the gas line in the tank a few weeks ago. Starts almost immediately now! Make sure you verify O.D. of the valve you are going to use because the hole in the tank is relatively small.
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post #10 of 12 (permalink) Old 04-02-2019, 09:39 AM Thread Starter
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Awesome! What valve did you use? Sandbuster found a nice inline one on amazon for 8$


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post #11 of 12 (permalink) Old 04-02-2019, 02:23 PM
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I purchased these. Only took 9 days to get here!

https://www.ebay.com/itm/2Pcs-8mm-5-...72.m2749.l2649
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post #12 of 12 (permalink) Old 04-02-2019, 05:15 PM Thread Starter
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Nice! Sometimes I feel like eBay is getting worse by the day. Does anyone know if they make an electric sender for the 660 maybe with just a low fuel indicator?


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