HMMM i wonder... ive owned several diffrent vintage Lawn Boys and still use one of the last year they made them with 2-cycle engines (2004) . LOVE the front discharge ....mine is a grass cannon !!!
When i used to work in the marine industry we used a product called SIKAFLEX for caulking ....worked amazing on anything.
It was a little hard to work with though. As for your sewer vent maybe try a product called CYCLONE SEWER VENT, don't
have an RV myself but i know others that like it.
Need to repair some fences and such from a winter wind storm. Wasn't really looking forward to lifting the
concrete out of the ground so this is what resulted. One down 6 to go
Ihave a 110 volt lincoln and use flux core for the same reasons .I have been using it for several years now ,
1\8 metal is no problem with a single pass. Heavier metal would need more. Mine can be converted to gas if you
want it but some can't so be careful.
http://www.homedepot.com/p/Lincoln-Electric-Weld-Pak-125-HD-Wire-Feed-Welder-K2513-1/100670933#specifications
We had one of those at our hunt camp a few years back .Actually used it for food for many years
unfortunately the feet got rotten and nobody was interested in saving it... #$@^. hind sight is always 20\20