Welcome to HydrostreamForums.com
If you're not registered, please consider doing so. It's easy - just click the "Register" link at the top
right corner of the page. Our forum needs members like you to contribute to the site in order to survive.
We are a community of boat lovers and Hydrostream enthusiasts here; we are happy to help anyone
who may need advice or guidance for their 'Stream; and we encourage members to offer their advice
and guidance to others as well. Thank you for visiting our forums, and please register.
We're better than Facebook.

Registering only takes a few minutes and you can do so by CLICKING HERE

If you are a member, don't forget to log in to take full advantage of the forum.

Viper help

Chat about anything boating or non boating here. Try to keep it clean.
User avatar

Topic Author
ViperMan
The new guy
The new guy
Posts: 13
Joined: Oct 06, 2013 9:06 pm
Location: Toronto, Ontario

Viper help

Post by ViperMan » Jul 09, 2015 6:45 am

Hey guys!
Hope everyone's enjoying their summer, out on their boats and such...
Anyways, I've got my viper, lower end was just rebuilt, and motor was looked at, so I'm not worried about that
BUT, after the motor work, I took the jackplate taken off, it was a 6 inch, and I was told for a viper that's too much.
So I went to drive the boat, and the engine is running better then ever, but my setup is wrong.
My top speed has dropped,
More of the boat is in the water then before, even trimmed up.
My top speed used to be 55mph ( but it chine walked)
I put the fin on it = 48mph
Removed jack plate =44mph


So what I'm asking from you experts!
What is it I need to do to get my viper rippin better than ever! But still drivable( without chine walk, porposing)
Because I know it should/can go faster

Prop is a 23p
Motor is a 115hp mercruiser
I'm guessing jackplate, other things could help me.
Please, any info is helpful, I've been struggling getting this boat setup for a while now, and getting somewhat frustrated.

[ Post made via iPhone ] Image
Attachments
image.jpg
image.jpg (123.65 KiB) Viewed 1023 times

User avatar

steve3340
Getting my feet wet
Getting my feet wet
Posts: 95
Joined: Sep 24, 2011 11:24 pm
Location: Western Ma

Re: Viper help

Post by steve3340 » Jul 11, 2015 6:17 am

Try tech talk on the Hydrostream history page. I set up a vector from the info in there. Spot on I'm sure there's was more but no trial and error

[ Post made via iPhone ] Image

User avatar

rev.ronnie
HSF Lifetime Supporter
HSF Lifetime Supporter
Posts: 165
Joined: Jan 24, 2010 10:34 pm
Location: North Branch/Pine City MN

Viper help

Post by rev.ronnie » Nov 09, 2015 1:14 am

I have a viper. After installing trim tabs on the hull the porposing and handling issues are gone. It only runs 46 with an 80hp triple, but was miserable without them.

Chine walk is more than likely steering related. Loose mounts, side to side slop and too low of a motor height will contribute to that.


Here's mine with the tabs back on. I had removed them to fill and re drill the holes, which were loose.

If I had another set of tabs, I'd send them. I'm all out of the run we made. I have the dimensions though.
image.jpg
image.jpg (252.96 KiB) Viewed 723 times
image.jpg
image.jpg (322.96 KiB) Viewed 723 times
[ Post made via iPad ] Image
1990 HST / 260 EFI offshore
1991 Vaserette YT bowrider 200 Merc
1987 Venus XT/ 200 Yamaha
1983 Viper II 90 Merc. triple

User avatar

aaron78viper
Regular
Regular
Posts: 160
Joined: Jun 03, 2012 8:29 pm
Location: MA
Been thanked: 5 times

Re: Viper help

Post by aaron78viper » Jul 24, 2017 1:11 pm

Hows the viper doing? I would say put the jackplate back on, if you want to go fast get a 2.0 150 or bigger 2.4 motors. 6 inch jackplate and a cleaver work great

User avatar

Topic Author
ViperMan
The new guy
The new guy
Posts: 13
Joined: Oct 06, 2013 9:06 pm
Location: Toronto, Ontario

Re: Viper help

Post by ViperMan » Jul 25, 2017 8:32 pm

No real luck with the viper 😔. Don't have the money to be trying expensive things and purchasing jack plates and such. Specially if it's not 100% fixed after that. Right now I just cruze around 45 mph, not on the pad, it's too sketchy with the setup on it.

[ Post made via iPhone ] Image

User avatar

Hippie459MN
Site Admin
Site Admin
Posts: 3487
Joined: Mar 25, 2009 7:31 pm
Location: Crown, MN
Has thanked: 71 times
Been thanked: 17 times
Contact:

Re: Viper help

Post by Hippie459MN » Jul 26, 2017 8:00 am

Welcome back! Now with that, Sell that 6" plate and see if you can find a 2" or a 4" plate for it (My opinion 6" is way too much for a viper) and do like Ron said, maybe try some trim tabs. Also, make sure everything with the steering is nice and tight.
-Kevin
Project Vulture | Project Vector | Project Vamp
The Vulture Wish List | Project CobraJet

1977 HydroStream Vulture - Worlds longest ongoing project. :eek:
1982 Hydrostream Vector
1982 Hydrostream Vamp
1976 CobraJet Jet Boat - Outboard conversion project
199? Glastron - aka Boat Anchor
1976 Pontoon - aka The Family Truckster

User avatar

aaron78viper
Regular
Regular
Posts: 160
Joined: Jun 03, 2012 8:29 pm
Location: MA
Been thanked: 5 times

Re: Viper help

Post by aaron78viper » Jul 26, 2017 1:07 pm

ill bet you can get that 115 going a whole lot better than 45. given the limited weight and power i would say a 6 inch set back jack plate would be great, and something like a 24 pitch or 26 pitch should get you going good. a decent steering system should help you get control of that thing. what do you have going on with it now? anything we can help you with?

User avatar

transomstand
Hydrostream Addict
Hydrostream Addict
Posts: 417
Joined: Apr 07, 2009 6:50 pm
Location: Fairfield, CT
Been thanked: 6 times

Re: Viper help

Post by transomstand » Jul 27, 2017 2:42 pm

Well.........before the internet was invented we ran Vipers 70 mph with inlines and NO jackplate. But I guess that don't count :roll:
transomstand
Original owner 1975 Ventura II SE

User avatar

transomstand
Hydrostream Addict
Hydrostream Addict
Posts: 417
Joined: Apr 07, 2009 6:50 pm
Location: Fairfield, CT
Been thanked: 6 times

Re: Viper help

Post by transomstand » Jul 27, 2017 2:51 pm

Somebody forgot to tell Joe Sauer he needed a jackplate to go fast


transomstand
Original owner 1975 Ventura II SE

User avatar

AdamDK
Moderator
Moderator
Posts: 139
Joined: Jul 19, 2016 6:58 pm
Location: Toronto, Ontario
Has thanked: 13 times
Been thanked: 21 times

Re: Viper help

Post by AdamDK » Jul 27, 2017 3:48 pm

You forget though that back before the internet was invented, GPS didn't exist either.

"My pitot speedometer bounced to 70 when I went over that wave! Let's just go with that!"

[ Post made via Android ] Image

Post Reply

Who is online

Users browsing this forum: Bing [Bot] and 1 guest