ArboristSite.com Sponsors
 
 


550xp fuel tank leak..quick fix?

Discussion in 'Chainsaw' started by Brad2185, Jan 6, 2018.

  1. Brad2185

    Brad2185 ArboristSite Operative

    Joined:
    Sep 24, 2011
    Messages:
    430
    Likes Received:
    107
    Location:
    Maryland
    I was out today cutting firewood and noticed my 550xp was leaving a wet spot of fuel where ever I sat it down. So I thought it was leaking from the fuel cap? Come to find out it’s leaking around the fuel tank sight window. Slow leak...a drip every 5 second or so.

    Has any found or knows a quick permanent fix? Without replacing the fuel tank...


    Sent from my iPhone using Tapatalk
     
  2. earlthegoat2

    earlthegoat2 ArboristSite Guru

    Joined:
    Aug 20, 2016
    Messages:
    692
    Likes Received:
    720
    Location:
    SE GA
    JB Weld
     
    MacAttack and svk like this.
  3. svk

    svk A little bit of everything

    Joined:
    Oct 19, 2009
    Messages:
    21,702
    Likes Received:
    55,852
    Location:
    MN
    Drain the tank and clean it up real good with degreaser and let it dry well before you apply a gas resistant sealant.
     
  4. Brad2185

    Brad2185 ArboristSite Operative

    Joined:
    Sep 24, 2011
    Messages:
    430
    Likes Received:
    107
    Location:
    Maryland
    Ok. Thanks you guys for the ideas. I will try and report back.


    Sent from my iPhone using Tapatalk
     
    svk likes this.
  5. ajs2654

    ajs2654 ArboristSite Lurker

    Joined:
    Oct 8, 2014
    Messages:
    17
    Likes Received:
    7
    Location:
    Akron, Ohio
    Hi,
    I know this is old thread. But did you have much luck using the JB weld to fix your leak? I am having the exact problem with mine.
     
  6. Brad2185

    Brad2185 ArboristSite Operative

    Joined:
    Sep 24, 2011
    Messages:
    430
    Likes Received:
    107
    Location:
    Maryland
    Hey, I did not have luck with the jb weld


    Sent from my iPhone using Tapatalk
     
  7. cuinrearview

    cuinrearview Red saw lover

    Joined:
    Oct 24, 2014
    Messages:
    7,056
    Likes Received:
    12,454
    Location:
    Hillsdale, MI
    I used Seal All on a 450 with the same leak. It took a couple tries.
     
  8. Tobystihl

    Tobystihl Creaky Limb Tree Care

    Joined:
    Jul 16, 2012
    Messages:
    209
    Likes Received:
    221
    Location:
    Sunny Wales UK
    Super glue is what I use, I have successfully sealed a few tanks, in particular the Stihl ms201t where they split on the seam. Glued, pressure tested and never had any comebacks!
     
    svk likes this.
  9. CR888

    CR888 Addicted to ArboristSite

    Joined:
    Feb 17, 2013
    Messages:
    3,576
    Likes Received:
    6,107
    Location:
    Australia
    Preparation is key here, we are trying to use a product that will bond to the tank walls that usually have oil smeared all over. Every trace of oil must be gone. I use detergent a few times followed by alcohol. Clean, clean, prep area in question with abrasive like sand paper to roughen up surface to increase bond strength.. The use JB or other sealant, but unless its properly prepped no product will work well. I've successfully done a few tanks, its a job that needs to be done properly with a little effort.
     
  10. MacAttack

    MacAttack I love the smell of 2-stroke

    Joined:
    Nov 15, 2019
    Messages:
    83
    Likes Received:
    70
    Location:
    Western NY
    JB Weld is resistant to gasoline once it's cured. I've used it to fix gasoline leaks in other applications. The key is to get the repair area completely clean, i use acetone which is recommended by JB Weld, and rough up the area to fix with fine sandpaper. It also cures best above 50 degrees F.
     
  11. Snap

    Snap ArboristSite Operative

    Joined:
    Nov 7, 2011
    Messages:
    299
    Likes Received:
    74
    Location:
    Nutmeg State
    JB Weld told me to use their "Plastic Bonder" to install a plastic fitting in a plastic tank. I asked about the "JB Weld" and was steered back to the Bonder. I am getting around to trying it.
     
    MacAttack likes this.
  12. MacAttack

    MacAttack I love the smell of 2-stroke

    Joined:
    Nov 15, 2019
    Messages:
    83
    Likes Received:
    70
    Location:
    Western NY
    I've never used their plastic bonder but I'd imagine it's a type of CA plastic glue.
     
  13. Snap

    Snap ArboristSite Operative

    Joined:
    Nov 7, 2011
    Messages:
    299
    Likes Received:
    74
    Location:
    Nutmeg State
    Package says it can fill gaps and is "quick-setting, two-part, urethane adhesive". I was warned that their products do not resist ethanol, so even with JB Weld you'd want to pay attention to the fuel used.
     
  14. Franny K

    Franny K xyz

    Joined:
    Jan 16, 2013
    Messages:
    2,404
    Likes Received:
    977
    Location:
    North eastern Ct USA
    I have used JB stick or equivalent from Walmart where chain derailment has damaged the oil tank on battery pole and top handle chainsaws. I vaguely remember repairing a metal gas tank in a van with similar product from Auto parts place.
     
    old guy likes this.
  15. MacAttack

    MacAttack I love the smell of 2-stroke

    Joined:
    Nov 15, 2019
    Messages:
    83
    Likes Received:
    70
    Location:
    Western NY
    Hmm interesting, i have some JBWeld 2-part clear epoxy that i haven't tried yet, probably similar or the same product.

    My understanding of JB Weld (as best I know) is that once it's cured it's resistant to chemicals, including gas with ethanol. What you don't want to do is use alcohol to clean the part that you want to fix because it can effect the bonding / curing process, they recommend using acetone.

    I have not encountered JB Weld being attacked or dissolved by any normal chemicals in the shop once it's cured. I love the stuff, use it frequently.
     
    old guy likes this.
  16. Snap

    Snap ArboristSite Operative

    Joined:
    Nov 7, 2011
    Messages:
    299
    Likes Received:
    74
    Location:
    Nutmeg State
    I double checked today and this was the reply: "Plastic Bonder is the recommended product for plastic gas tank repairs. It is impervious to ethanol free gasoline. It is best to get a minimum of 1/8th of an inch in product thickness".

    Mac; you might want to check on ethanol and JB Weld. They told me that products were not formulated to resist ethanol and as I understood it something to the effect that there was a chemical incompatibility. It doesn't really affect me because I never put ethanol laced gas in any of my equipment.

    I am going to give the PLASTIC BOND a try on installing vents in my tank caps. Other products (not JB) have failed after a short time and I've scrapped too many tank caps already in the attempts to solve my issue. I'll followup when it goes one way or the other.
     
    MacAttack likes this.
  17. Snap

    Snap ArboristSite Operative

    Joined:
    Nov 7, 2011
    Messages:
    299
    Likes Received:
    74
    Location:
    Nutmeg State
    I tried Seal All and I was fooled into thinking it worked. One the second tank of gas it started dribbling and then pealed off. Apparently not a good bond. There wasn't oil/gas contamination befoehand because the parts were new.
     
  18. cuinrearview

    cuinrearview Red saw lover

    Joined:
    Oct 24, 2014
    Messages:
    7,056
    Likes Received:
    12,454
    Location:
    Hillsdale, MI
    Just because a part is new doesn't mean it's clean. Especially a new plastic molded part. Like I said, mine took a couple tries but ended up being a solid repair.
     
  19. MacAttack

    MacAttack I love the smell of 2-stroke

    Joined:
    Nov 15, 2019
    Messages:
    83
    Likes Received:
    70
    Location:
    Western NY
    Let us know how it works, i use a lot of epoxies, etc so it's good to hear first hand experience.

    I'll keep that in mind about Ethanol, like you my carbureted equipment never sees a drop of ethanol, only conventional gasoline, worth every penny.
     

Share This Page