Hello all, Haven't been on for awhile. A while back I had trouble with one of my ss16 twin's fuel pump. I took off the tank,stripped all of the fuel line from the tank to the firewall. Up under the seat deck where no one would go I found what I figured was another filter and couldn't figure out why they would have put one there. I replaced the fuel line and pulse type pump and now after it sets for a few days the engine won't start. No fuel. Now I am wondering if that "filter" wasn't actually a check valve to keep the fuel from running back into the tank. Does this make sense to any of you? If so can anyone tell me where I might purchase one? Thanks in advance. This is a great site with lots of helpful members.

SS16 fuel problem
Started by
iron Mike
, Oct 11, 2011 07:34 PM
7 replies to this topic
#1
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Posted October 11, 2011 - 07:34 PM
#2
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Posted October 11, 2011 - 07:40 PM
If it was a check valve, someone added it, I don't think they came with one. I read somewhere one time to use the small diameter fuel filters with the Onan engines. I don't know if there is a specific reason, or just somebodies own idea. I use regular large diameter in line fuel filters and haven't had an issue.
- iron Mike said thank you
#3
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Posted October 11, 2011 - 07:44 PM
I've never seen a check valve, but it sounds like a good idea. I do have 2 thoughts tho.
You could PM member BHTS and see if he has stock on them.
Or put a manual shutoff valve near the carb where you can get to it without opening the hood. Anywhere in the line should do it.
You could PM member BHTS and see if he has stock on them.
Or put a manual shutoff valve near the carb where you can get to it without opening the hood. Anywhere in the line should do it.
- iron Mike said thank you
#4
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Posted October 11, 2011 - 08:08 PM
If you get a part number for a inline check valve I would like to try on my 318 . I was thinking on trying this , used on snowmobiles , but didn't want to dig into the tank , Al
https://www.denniski...27.prd/1827.sku
https://www.denniski...27.prd/1827.sku
#5
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Posted October 11, 2011 - 08:10 PM
Im pretty sure the factory pump has a built in check valve to prevent backflow of fuel.
- iron Mike said thank you
#6
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Posted October 11, 2011 - 11:21 PM
Yes it does have a check valve, better recheck how you put it back together
- iron Mike said thank you
#7
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Posted October 12, 2011 - 11:40 PM
I will do that Al.
- Alc said thank you
#8
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Posted October 12, 2011 - 11:45 PM
I'll have to try and purchase one. I,of course,destroyed that one. Curiosity is costly some times. thanks for the info.