by Arkie » Sat Aug 19, 2023 10:16 am
Just couple tips on them old Briggs dogs that I've used when doing a sump.
I usually try to check the crank end play before pulling the sump but if I have not and I wonder if I can eliminate the sump gasket I'll install the sump with only about 4 of the bolts and leave the bolts loose, then slowly snug up each sump bolt while turning the crank. If it start getting turning resistance I know I need a gasket/gaskets. If I get the bolts snug and it still turns freely I'll see if I have any crank end play, at least .002.
I've put few of them dogs together using Yamaha bond 4 and no gasket with good long term results. I prefer not using the paper gasket but if I have to I use the gasket I use Yamaha bond very sparingly on each side wiping a very thin coat on each side of the very cleaned aluminum with one finger so as to cement the thin and clean dry paper gasket in place and not excess squeezing of excess to the inside of the block. I seen what I think is a weal compression mating surface and as the gasket gets old/slick and thinner it just starts leaking. I had to take one apart sometimes back that I had done without the gasket using only Yamaha bond due to the wimpy compression release breaking and I had to carefully keep going around the sump with a rubber mallet to get the sump loose.
I prefer the Yamaha Bond for this sump area sealing instead of the weaker RTV.
The Yamaha Bond 4 is more expensive than the RTV, BUT I just store the unused tube portion a fridge and it lasts forever (will last over a year) for re-use later.