have always wanted a hydrostream, and recently purchased a 78 viper with
76 135hp Evinrude. Was propped poorly. Got a 26" cleaver with
the engine raised about 2" mounted directly to the transom and
now run a scary chine-walking 62 at 5200 rpm. There is more but
I can't seem to steer out the chine walk. The engine does have a
skeg-guard which seems straight axially, but tilted towards the starboard
side at the bottom. I trimmed off the goofy wing on the bottom
of it, squeezed the crossection down for less hydrodynamic drag
and to tighten it nicely on the 1.3" of real skeg remaining. I
plan to but a new skeg on it, and possible contour it for torque steer,
but there does not to be much torque steer until I get the engine trimmed
way up beyond any real running trim. Therefore I plan to use a
normal replacement skeg. Any input here?
now playing with weight distribution. Winter is coming and I want to
get a feel for what will work with battery / fuel tanks (2 x 6 gallon)
placement. Interior is nothing but a plastic drivers seat, which will
become a 4 seater by spring.
walk is the big issue. Any tips to reduce chine walk in the Viper?
will recontour the hull this winter if necessary, but I was thinking a
small trim-tab type damper at the chine if the skeg and weight
distribution have little effect.
is a small chunk in the starboard side of the pad (.25" deep from the
side, 1.0" long positioned about 2" in front of the transom
step) which has a nice rounded shape.
I doubt this has much influence on the walk.
Please submit whatever questions you have to IHRTechTalk@yahoo.com. All questions and answers selected will be displayed on this page as they come in. Note: though all boaters are welcome, priority may be given to I.H.R. members. Randy can not be held responsible for any advice given. Though his information and expertise is second to none, he has no control over what you do with your boat. It is up to you to boat safely and act responsibly, and his advice is only to be used as a guidance for your high performance boat/motor of which you are the one responsible for the risks involved.
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