Let's say you've taken your saw apart, removed the base gasket, did some other mods, and now you're putting it all back together. What do you use to seal up the interface between the cylinder and the crankcase? I have an old tube of Permatex red 51813 sealant, but maybe there's something better out there?
base gasket sealant
- Thread starter rmihalek
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RIDE-RED 350r
No wing, no prayer
Threebond 1194. It's an adhesive, flexible sealant. Many manufacturers use similar if not the same product it right at the factory instead of a conventional gasket. Rotax uses it for joining snowmobile crankcases, Yamaha uses it, and I'm sure there are many more.
Don't use silicone type rubbery RTV sealant.
http://www.amazon.com/Three-Bond-Liquid-Gasket-TB1194/dp/B0012TUVAW
Don't use silicone type rubbery RTV sealant.
http://www.amazon.com/Three-Bond-Liquid-Gasket-TB1194/dp/B0012TUVAW
Warped5
WingNut
This stuff .. pretty much any auto parts store .. new and old packaging:
Tor R
Addicted to ArboristSite
Me gone try locktite 518
Oh Man, I bought a tube of that RTV stuff. Did a few test cuts and decided I wanted to go back into the saw for a small change and, wow! What a mess! There was this black gooey crap all over the base and transfer ports, etc.
Warped5
WingNut
RIDE-RED 350r
No wing, no prayer
Well, one thing to remember is to apply a thin, even coat to both mating surfaces. You want adequate coverage, but you don't want to over-do it resulting in large quantities of excess sealant oozing into the case, ports, or anywhere else it could pose a problem.. One thing that comes to mind that excess sealant could cause an issue with is pulse ports in the base gasket deck like a 394 has. Too much sealant could obstruct it resulting in no fuel getting pumped into the carb.
o8f150
Tree Freak
i bought a tube of denture adhesive,,, works great
RIDE-RED 350r
No wing, no prayer
^^^whatever blows your skirt up^^^ 
I got the Threebond and took a chance on this stuff: http://gasgacinch.com/home/products/
I got the 440-A (4 ounce). Never heard of it before.
I got the 440-A (4 ounce). Never heard of it before.
Yamabond 4.
Closest dealership to me. Honda dealer doesn't carry hondabond. Like $10 a tube.
Never had a problem with it, instal or removal.
Closest dealership to me. Honda dealer doesn't carry hondabond. Like $10 a tube.
Never had a problem with it, instal or removal.
Lots of guys have used silicone and gotten away with it. However, it's not the correct or recommended product. Any of the products mentioned about will work great. I've used Loctite 518, Threebond 1194, Permatex Motoseal, and others. I use 518 most all the time now.
tickhound93
ArboristSite Guru
This stuff. Or permatex Indian head- do they even make this stuff anymore?? They should. Damn fine stuff.This stuff .. pretty much any auto parts store .. new and old packaging:
tickhound93
ArboristSite Guru
Silicone is an old Harley thing, when shovelheads and ironheads marked their territory with a nice oil spot. Three bond/ yamabond/ hondabond motoseal, its all the same stuff. And it works
Definitive Dave
wanna-be saw racer, saw hoarder, parts whore
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518
KG441c
Keith
Thats a good reason to use anaerobic like 518 so it will only dry in the absence of air and all else will wash out if any got inside cylinder
KG441c
Keith
Ive used permatex motoseal, dirko, yamabond , and 515, 518. The motoseal and yamabond are alil messy to me and the 518 is the best ive used. Ill use the 518 on the bottomend also even with a gasket
beaglebriar
ArboristSite Operative
I've always used hondabond but after all the good reviews here I have a tube of 518 on the way.
KG441c
Keith
3 main things to look for imo r chemical resistance, anaerobic, ease of use
