81 GS750E - Missing at Idle & Low RMP

[Grimly]

If you can't get the OEM or Dowty washers, use a smear of Hylomar Blue on the bolt face and both faces of a plain washer. It won't leak fuel, ever.

[OriginalOwner]

The stock petcock washers are dowty type; there is a rubber seal on the ID, and steel overall. Buy the OEM washers and be done with it.

Link? Looking, but I can't find them?

[Rich82GS750TZ]

# 8……………

https://www.partshark.com/oemparts/a/suz/50d40086f8700230d8b4e2de/fuel-cock

also on ebay. https://www.ebay.com/itm/32619712065...Bk9SR7yXzOmgZA

[OriginalOwner]

If you can't get the OEM or Dowty washers, use a smear of Hylomar Blue on the bolt face and both faces of a plain washer. It won't leak fuel, ever.

I read about Hylomar Blue, sounds like some righteous stuff!! From your experience, what's the better route? Buying the original part, upgrading to a "dowty washer" that works better and will last longer than the OEM, or going the Hylomar route. Also, is Hylomar hard to remove/deal with when returning to the area? Thanks!!

# 8……………
https://www.partshark.com/oemparts/a...e2de/fuel-cock also on ebay. https...

Thanks for that, Rich!. After looking harder I was able to find my old parts diagrams and I got the part number was able to search it. Do you suggest using the OEM washers or something else? Which source do you recommend for making the purchase as far as price and dependability?

Thank you!!!

[Rich82GS750TZ]

I've bought many orders of parts from partshark. Never had a problem. Shipping will cost more that the 2 washers. Check the ebay add, see if it includes shipping. I don't recall if I've ever bought anything from that seller. Ebay is definitely a buyer-be-ware type deal. But that seller has sold a bunch of items and has100% positive feedback. But we're not talking about big bucks here.

If you want to go cheap and quick, no guarantee that it will work, But I have used these for similar washers that go under the long bolts on the right and left side top of the Valve cover. I used the washers from metal roofing screws. They have a rubber washer attached to them. Any hardware store will have them. Just have to unthread them from the screws. They have a concave shape and will flatten out when torqued down. Will they work on the petcock bolts? I don't know. They may be too thick. Problem is, if they don't seal, it's a pain to empty the tank, remove and redo.

[Grimly]

I read about Hylomar Blue, sounds like some righteous stuff!! From your experience, what's the better route? Buying the original part, upgrading to a "dowty washer" that works better and will last longer than the OEM, or going the Hylomar route. Also, is Hylomar hard to remove/deal with when returning to the area? Thanks!!

The OEM / Dowty washers lasted for decades, so I've no complaints about them, but when time came to re-use them, they were past their best, and I just used what was available, the Hylomar and plain washers. That was twelve years ago, and I've no complaints.
Use OEM if you can; if you can't, don't use silicone sealer*, use Hylomar.

*silicone sealer balls up and goes crumbly in the presence of gasoline.

[OriginalOwner]

Thanks guys for the great advice. I ordered them here:

https://www.ebay.com/itm/326197120653?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=uNIvHnIzSYm&sssrc=2047675&ssuid=7dPnllW-Tje&widget_ver=artemis&media=COPY

It was the best price I found for OEM ($3.20 each) and the seller has 100-percent positive rating.

[Rich82GS750TZ]

Piece of mind for getting the right part is definitely worth at least $6.40.

[dgates1]

OriginalOwner I just ordered these washers from the same seller. Did they do the trick for your leak?

[OriginalOwner]

OriginalOwner I just ordered these washers from the same seller. Did they do the trick for your leak?

I didn't install them yet as the plumbing washers are holding...for now. When I do my upcoming end-of-the-season "dry-dock" routine, I'll put them in then.

But my low idle and hesitation issue under 3000 RPM's has returned. It feels different from before, I'm thinking i may be a fuel/air mixture issue this time. It gets better if I pull the choke out about a 1/10 of the way.

Not sure.