jaystew324

Hi Guys,

I have a Checkmate 251 that I'm building a ~700hp 511CI BBC for. I don't think the OEM Merc steering system is going to be up for the abuse, so I'm trying to convert to hydraulic steering. I've purchased a set of Hynautic steering rams and now I'm looking to buy the rest of the steering system. I've seen many SeaStar helms on Ebay so I was thinking that they may be a good option. My question: Can I use a SeaStar helm in conjunction with the OEM Merc power steering pump and Hynautic rams? If so, Which ports do I plumb to on the helm? I'm having trouble finding a good schematic. If this won't work, I'm looking for other recommendations. Please keep in mind that I'm on a small budget.

thanks for your help,
Jaystew324

ricardo mann

Google (hydrostatic steering unit ) the is how it works and look at mayfair steering parts you will get your head round it . 4x4 sites simplify it

BBYSTWY

Go to hardin marine and buy an "inside hydraulic kit" I know you are on a budget but steering is not something you want to cheap out on man. That thing will hook, spin, and flip before you can say "What the f*ck just happened?!!"

phragle

iTrader: (3)

Aren't some hynautics low pressure ?

PARASAIL941

Seastar/hynautic helms are small displacement helms. They will physically work , but you will end up having about 15 turns lock to lock , which is useless on a high performance application. Good luck!!!

modvp

The SeaStar 2.4 - Front Mount Helm HH5272-3 helm will not give you 15 turns lock to lock.

jaystew324

Thanks for all the help guys. I've been looking up hydrostatic steering units and it seems to be the ticket. :-) Much appreciated.

ricardo mann

hynauticc rams x2 K5 modal Hydrostatatic steering unit type HKU /3 (open centre important) standard 1200 or so mercruiser pump gets me 3 .5 turns lock to lock . look on google latham steering catalog all in there if you want help let us know i got mine perfect . Ricky