Quick help,

I just rebuilt my motors and purchased a hardin seaward series manifold set for my 700sci's

I would like to start up the engines on the hose outside the water just to make sure everything is in order. I do not want to use the old tailpipes yet due to leak issues.

Would it be fine to start engines with manifolds on but no tail pipes just to run for 5 to 10 minutes on the hose?

Thanks

Ayuh,...... No problem, especially if on the ground,......
If in the hull, just make sure the drain plug is out,....

Could always go to hardware and grab a couple 4” elbows and short ext duct pipes. Yes sounds cheesy but it’s worked for me in the past. Couple dabs of silicon to help hold in temporally. Just sayin! 🤷🏿‍♂️