Smitty275

What the difference between a hydraulic helm for an IO vs an OB? Found a used SeaStar SKU:HH5779-3 / UPC:HH57793. It's listed as OB some places and universal others. I want to add external steering to an IO. Any help is greatly appreciated.

DrFeelgood

Typically an I/O is going to have a power steering pump mounted to the engine whereas an OB will not. The OB helm acts as the pump whereas the I/O does not.

JaniH

This may help.

phragle

iTrader: (3)

you need to match the volume/flow of the helm with the cylinders and there are a lot of variables... you could get it right or end up with too many turns lock to lock and insensitive vague steering or not enough and twitchy steering.

Smitty275

That's what I was thinking. I can get everything needed thru our shop customers except a helm. I'll have to check volume of the cylinders and go from there.
Thanks Guys

HEMTT

I have a hydraulic helm on my 30' Cobalt with power steering pump. My Arnesons had no provisions for cable. For high speed testing I had the rams in parallel, slowing the steering remarkably. I never did bother going back to series plumbing because the extra few turns didn't really bother me. Never missed the steering on the I/O TR's.