Straight pipe on yanmar 2TR series engine

[bmaverick]

I currently have my exhaust vertical after it being horizontal for a while. I will keep it vertical, but I will take off the short extension and put a taller stack on along with a exhaust cap

Put a cap on it now, if water gets in there, costly repairs you would have to endure.

 

[millard762]

I keep it parked in my garage plus it currently has the factory short and angled extension

 

[Jtullis13]

When I got my YM155d the exhaust was horizontal and at times it would blow back in my face, so I positioned it vertically and that actually made it worse, so I put it back the way it was horizontally. I think the key here is to have a longer pipe vertically to solve the problem. I left if horizontally as it was the lesser of the 2 evils, and I use that little guy in the woods and don't want a taller exhaust, more to catch it on and or break it.