Author Topic: Anyone running 70-80hp motor on a CVX16?  (Read 532 times)

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Offline Buckey

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Anyone running 70-80hp motor on a CVX16?
« on: January 17, 2021, 12:11:19 PM »
I picked up a CVX-16 recently as an upgrade from a GT150 I have now.  I have a 1980 75 Evinrude (49ci) on the GT-150 and get a top speed of 41mph with a comfortable cruising speed of 34-35 (with 19p prop).  The GT is I think 625lbs and the CVX is around 100lbs more I believe.  Until I find something else, I'm going to bolt the 75 to the CVX and wondered if anyone else has run this combination, and if so what is it like?  Thank you
« Last Edit: January 17, 2021, 12:13:20 PM by Buckey »

Offline Hyperacme

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Re: Anyone running 70-80hp motor on a CVX16?
« Reply #1 on: January 17, 2021, 12:41:49 PM »
Welcome to the forum Buckey !

Go here and scroll down to CVX16 test with 70 & 75 HP Johnson / Evinrude's.
http://forum.cgoamn.com/index.php?topic=2924.0
Gregg
'76 CV16

Offline Hyperacme

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Re: Anyone running 70-80hp motor on a CVX16?
« Reply #2 on: January 17, 2021, 12:44:58 PM »
CVX16 / Stinger
Gregg
'76 CV16

Offline Buckey

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Re: Anyone running 70-80hp motor on a CVX16?
« Reply #3 on: January 17, 2021, 12:46:09 PM »
Welcome to the forum Buckey !

Go here and scroll down to CVX16 test with 70 & 75 HP Johnson / Evinrude's.
http://forum.cgoamn.com/index.php?topic=2924.0

Awesome stuff, thank you, exactly what I was looking for and more.  The 75 there identical to mine. :)

Offline Buckey

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Re: Anyone running 70-80hp motor on a CVX16?
« Reply #4 on: January 17, 2021, 01:00:03 PM »
Looks like the 75 oddly enough might be a good fit for the CVX16.  The reviews were reporting 41mph top speed with 4gph at cruising speed (29-30) with both the 70 and 75 around the same.  They ran the 17p on the 70 and a 19p prop on the 75.  No problem at all pulling a skier which was a surprise.  I'm glad that material was passed along to me, much appreciated.  I thought I was going to have to move up to a 115 or so for this boat.

Now what I might do is invest in a decent prop for the 75.

Offline Hyperacme

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Re: Anyone running 70-80hp motor on a CVX16?
« Reply #5 on: January 17, 2021, 01:16:53 PM »
I had a 1972 V156 with a 1994 60 HP Johnson .. would do about 40 to 42 MPH / GPS.
The V156 had a pad and was about same weight as your CVX.
I was running a 17P aluminum OMC prop.
I tried a 17P stainless steel OMC prop and didn't get any performance improvement so used the aluminum. 
Gregg
'76 CV16

Offline Buckey

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Re: Anyone running 70-80hp motor on a CVX16?
« Reply #6 on: January 17, 2021, 01:36:05 PM »
CVX16 / Stinger

Nice looking combination, thanks.

Offline Buckey

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Re: Anyone running 70-80hp motor on a CVX16?
« Reply #7 on: January 17, 2021, 01:39:38 PM »
I had a 1972 V156 with a 1994 60 HP Johnson .. would do about 40 to 42 MPH / GPS.
The V156 had a pad and was about same weight as your CVX.
I was running a 17P aluminum OMC prop.
I tried a 17P stainless steel OMC prop and didn't get any performance improvement so used the aluminum.

Impressive, and with a 60hp.  That 60 mind you would have been rated at the prop, correct?  My old motor was 75 at the crank I think.  Thanks for the feedback on the props as well.

Offline Hyperacme

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Re: Anyone running 70-80hp motor on a CVX16?
« Reply #8 on: January 17, 2021, 02:04:21 PM »
Correct .. prop rated.
Not sure when they changed rating or when they went to 56 ci motors.
The 1983 brochure lists the 70 / 75 as 49 ci and 1986 brochure lists 70 as 56 ci.

Evinrude Owners Manuals & brochures ..
http://forum.cgoamn.com/index.php?topic=2928.0
Gregg
'76 CV16

Offline Buckey

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Re: Anyone running 70-80hp motor on a CVX16?
« Reply #9 on: January 17, 2021, 02:05:51 PM »
I had a 1972 V156 with a 1994 60 HP Johnson .. would do about 40 to 42 MPH / GPS.
The V156 had a pad and was about same weight as your CVX.
I was running a 17P aluminum OMC prop.
I tried a 17P stainless steel OMC prop and didn't get any performance improvement so used the aluminum.

Nice boat by the way, thats one of my favourites.

Offline Hyperacme

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Re: Anyone running 70-80hp motor on a CVX16?
« Reply #10 on: January 17, 2021, 02:27:06 PM »
It was in very nice shape  .. Guy I sold it to back in 2011,  sent me pictures of it this summer.
He has taken good care of it ..
Gregg
'76 CV16

Offline Hyperacme

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Re: Anyone running 70-80hp motor on a CVX16?
« Reply #11 on: January 17, 2021, 02:37:36 PM »
On a 80 mile river run the V156 / 60 HP would use about 9 gal. of fuel.
My CV16 / 115 HP uses over 18 gal. on same run ..

https://www.youtube.com/watch?v=rdZc1lSOZKw
Gregg
'76 CV16

Offline Buckey

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Re: Anyone running 70-80hp motor on a CVX16?
« Reply #12 on: January 17, 2021, 04:08:11 PM »
It was in very nice shape  .. Guy I sold it to back in 2011,  sent me pictures of it this summer.
He has taken good care of it ..

Actually, my preference would be that boat as it would fit my need more than the ski boat.  The open bow is perfect for the kids/extra passengers.

And the fuel efficiency makes a difference for sure which is why I'm jazzed now to see this material on the 75 being on the CVX.

Offline Hyperacme

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Re: Anyone running 70-80hp motor on a CVX16?
« Reply #13 on: January 18, 2021, 01:38:29 PM »
Can you post some pictures of your CVX ?
Are you in Minnesota ?
Gregg
'76 CV16

Offline Buckey

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Re: Anyone running 70-80hp motor on a CVX16?
« Reply #14 on: January 18, 2021, 04:33:01 PM »
Can you post some pictures of your CVX ?
Are you in Minnesota ?

Hi, actually, the boats I have are Glastron replicas.  For purposes of posting on forums to gather information I specify the Glastron equivalent because nobody knows what I'm talking about when I name my boats.  So I have a 1980 Vanguard 'Banshee' which is a copy of the GT150.  And, now I have a DeltaCraft 170 XLT which copies the hull of the CVX exactly.  I'll be moving the 75 over from the Banshee to the 170.  I hope by coming clean I won't have to leave the site :)

And, I'm actually in Canada, I grew up on Lake of the Woods Ontario, across from Minnesota, and did lots of boating/fishing/Guiding there.  This is not a very good pic but of coarse its the 170 XLT.  Fairly solid, needs some seat work.  I'll have to see if I can find a pic of the Banshee.  The Banshee has a split windshield which you never see.  In that boat I did the stringers and floor.

For the 170 I can buy the Mariner, it has good compression but other than that I wouldn't know what I'm getting into, and I'm way more familiar with OMC.
« Last Edit: January 18, 2021, 05:12:03 PM by Buckey »

Offline Hyperacme

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Re: Anyone running 70-80hp motor on a CVX16?
« Reply #15 on: January 18, 2021, 05:40:29 PM »
Not a Glastron .. Oh Oh .. LOL
Don't worry .. your welcome here ..

WOW .. That's an almost direct copy of a CVX.
I have seen a splash from Canada, I think it was a "Swiftsure" or something like that, but stern was different without cut outs for step on stern. There was another brand also .. but can't remember there name.

Even the seats look like late 70's Glastron / Carlson's.
You could sell the ladder and retire and live like a millionaire ... everyone wants one !

Is there a HIN on the right side of stern, just under rub rail ?
Could you post it ?

I know there was at least four company's making GT150 splash's in Canada.
Gregg
'76 CV16

Offline Buckey

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Re: Anyone running 70-80hp motor on a CVX16?
« Reply #16 on: January 18, 2021, 05:55:09 PM »
Not a Glastron .. Oh Oh .. LOL
Don't worry .. your welcome here ..

WOW .. That's an almost direct copy of a CVX.
I have seen a splash from Canada, I think it was a "Swiftsure" or something like that, but stern was different without cut outs for step on stern. There was another brand also .. but can't remember there name.

Even the seats look like late 70's Glastron / Carlson's.
You could sell the ladder and retire and live like a millionaire ... everyone wants one !

Is there a HIN on the right side of stern, just under rub rail ?
Could you post it ?

I know there was at least four company's making GT150 splash's in Canada.

I think Vanguard copied the CVX hull as well, and called it 'Phantom'.
There is a number on the right side of the stern but I don't have the boat here, its still at the marina where I bought it.  Yeah, this one is an exact copy of the CVX hull, even has the little indentation on each side about a 1/3 of the way up from the back of the boat.

The one thing it doesn't have is the aluminum supports on each side of the windshield.  I'd like to add those on, but they aren't cheap.

Hey, I wonder what the chances are of the foam under the floor being dry?

Here is a part pic of the Banshee with the 75.
« Last Edit: January 18, 2021, 06:04:29 PM by Buckey »

Offline Hyperacme

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Re: Anyone running 70-80hp motor on a CVX16?
« Reply #17 on: January 18, 2021, 06:16:47 PM »
Did a search ..
https://mcdougallbay.com/bid.php?arg=64AFD932-0B55-499B-B3D1-155C7F06DBE7


Dash and deck look different and windshield looks like a CSS16 from 1992.
Gregg
'76 CV16

Offline Buckey

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Re: Anyone running 70-80hp motor on a CVX16?
« Reply #18 on: January 18, 2021, 06:24:00 PM »
Did a search ..
https://mcdougallbay.com/bid.php?arg=64AFD932-0B55-499B-B3D1-155C7F06DBE7


Dash and deck look different and windshield looks like a CSS16 from 1992.

I'm surprised you found these pics, there aren't many out there for the DeltaCraft.  Your right, the deck doesn't have the nice CVX scoop and the dash is plane jane, they could have spruced that up.

I like the checkered flag decals on mine, there in good shape.  Gelcoat/metal flake will need a light sanding and buff.  I'm impressed with the article on the 75 pushing this same boat, and getting the 41mph with excellent fuel econony.  I likely will buy the 115 Mariner though.  Its a 1982 which would have been when they started reporting HP at the prop.  But again, I'm not sure what I'd be getting into with it.

Offline Hyperacme

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Re: Anyone running 70-80hp motor on a CVX16?
« Reply #19 on: January 18, 2021, 07:29:14 PM »
I look thru my "Boat Mfg. Codes" and didn't find any DeltaCraft listed .. or the ZLE code ?
But remember I also couldn't find the Swiftsure code ..

Will be interesting to see how they built your boat, some early CVX's had fuel tank running front to back and newer versions running side to side. Not sure but I've been told that older versions had a small piece of transom wood and latter versions had full width wood that was tabbed and glassed better.

My foam under floor and in stern boxes was dry, but wood floor under splash well, even though coated with resin, was rotted and transom wood behind left side was so bad (rotted) that I removed it with my fingers.

The mileage we get on the river run was 50% cruising (30 to 40 mph) 35% full or almost full throttle and 15% no wake / idling.
If you were pulling kids around on a tube all day at 30 mph you would most likely get much better MPG.

1982 was first year for prop rated 115 HP Merc / Mariner's and with some set up and prop testing get you mid 50's pretty easily.
I'm getting 53 to 54 MPH / GPS with my CV16 / 1989 115 HP Mariner and Dave's get a few mph more with his CVX16 / Johnson 115 HP.

Your bolt hole's in transom will be different from the Mariner to the 75 HP OMC motor.

This build still has some pictures ..
 http://www.classicglastron.com/phpbb/viewtopic.php?f=34&t=6642
Gregg
'76 CV16