Author Topic: 1987 Glastron/Carlson CVX-16  (Read 132449 times)

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Offline V153

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Re: 1987 Glastron/Carlson CVX-16
« Reply #220 on: July 31, 2012, 02:43:10 PM »
Yeah I'm a big fan of NGKs, 'specially the fine wire Irridium. B7HIX I believe is the correct part# for our motors, BR7HIX is the resistor version. Try em you'll like em.

Yo David .040s too wide. Should be .030. I've never heard of a OMC 2 stroke with a gap other than .030?
'81 C500_given away, bought back_75.1 mph
'81 Baja 15SS_140 Frankenrude_66.7 mph
'70 something SpeedCraft_(Allison 16R Clone)_69.0 mph
'79 CVZ19_given away
'71 V153_54.8 mph_wrecked


WALK TALL AND CARRY A BIG BILGE PUMP

Offline dorelse

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Re: 1987 Glastron/Carlson CVX-16
« Reply #221 on: July 31, 2012, 03:09:50 PM »
I was actually told not to move up to the Iridium NGK's on my Johnson 235HP as they run too hot and can cause early detonation? so I stayed with the L77J4's as well.

Dunno what's right...just what I was told by my guy.
1990 Sierra 1700

Offline V153

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Re: 1987 Glastron/Carlson CVX-16
« Reply #222 on: July 31, 2012, 03:56:13 PM »
I was actually told not to move up to the Iridium NGK's on my Johnson 235HP as they run too hot and can cause early detonation? so I stayed with the L77J4's as well.

Dunno what's right...just what I was told by my guy.
Really. Mebbe something particular to the V6? Never had a problem in the 90, 140 seems to like em too. Why would they "run too hot" if they were the correct heat range plug? Hmm. Velly intellesting ... 
'81 C500_given away, bought back_75.1 mph
'81 Baja 15SS_140 Frankenrude_66.7 mph
'70 something SpeedCraft_(Allison 16R Clone)_69.0 mph
'79 CVZ19_given away
'71 V153_54.8 mph_wrecked


WALK TALL AND CARRY A BIG BILGE PUMP

Offline dorelse

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Re: 1987 Glastron/Carlson CVX-16
« Reply #223 on: July 31, 2012, 04:00:19 PM »
I was actually told not to move up to the Iridium NGK's on my Johnson 235HP as they run too hot and can cause early detonation? so I stayed with the L77J4's as well.

Dunno what's right...just what I was told by my guy.
Really. Mebbe something particular to the V6? Never had a problem in the 90, 140 seems to like em too. Why would they "run too hot" if they were the correct heat range plug? Hmm. Velly intellesting ...  

You're assuming of course I know more than I do!  LOL.  Just what my guy said...they're too hot of plug for that motor (meaning mine).  Could have been just one mechanics opinion.  I switched them out and it made absolutely no difference what so ever...  ::)

I didn't have it long enough to play with the plugs.  I do know that Bluebell's new owner (should be at the meet btw) did find an bad coil pack and I believe its running much smoother now.

1990 Sierra 1700

Offline David CVX-16

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Re: 1987 Glastron/Carlson CVX-16
« Reply #224 on: July 31, 2012, 06:36:55 PM »
I gave in to peer pressure and brought back the Champion surface plugs to Fleet Farm and got the NGK surface plugs BUHL2. The opinions on Champion vs. NGK and even surface vs. gap are divided, even from experts - Johnson mechanics, Mercury mechanics, and Johnson boat racers.

I switched from using Champions to NGK years ago because the Champion plugs seemed to wear out faster.

A dynamometer test might reveal a small difference in horsepower output between the brands.

And, yes, the Johnson owners manual stated a sparkplug gap of .040.  
« Last Edit: July 31, 2012, 06:45:26 PM by David CVX-16 »
David
87' CVX-16, 85' 115 HP Johnson, 58.8 MPH GPS w/ 23" SRX Prop

Offline Retro Performance

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Re: 1987 Glastron/Carlson CVX-16
« Reply #225 on: July 31, 2012, 07:14:08 PM »
.040 is correct, we run Champion in all the OMC product. we are a dealer for Mercury, Evinrude, and Yamaha.....David, I have a Dyno at work and at home...maybe I could bring the dyno and test tank over some weekend for testing, I have most adaptors that K&O offers. I believe the electrode style plugs (L77JC4) are thought to burn hotter at idle than surface gaps....I think that is why they list both styles for 1 engine. Gapped plugs help reduce fouling if you do a lot of low speed stuff, I think thats true.....guess a guy could ask NGK or Champion. At any rate I think we should light up that V4 about 6:00 am some morning on the Dyno.......I know that is very popular in my neiborhood.......

Offline David CVX-16

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Re: 1987 Glastron/Carlson CVX-16
« Reply #226 on: July 31, 2012, 07:28:12 PM »
Don, your answer makes sense because Johnson recommends the electrode plug for slow speeds and the surface gap for higher speeds. Guess my boating is mainly in the higher ranges and I should switch to the surface plugs.



David
87' CVX-16, 85' 115 HP Johnson, 58.8 MPH GPS w/ 23" SRX Prop

Offline David CVX-16

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Re: 1987 Glastron/Carlson CVX-16
« Reply #227 on: August 10, 2012, 08:15:24 PM »
The surface gap NGK plugs for my 1985 Johnson 115 Hp are BUHXW-1 according to the NGK website. Of course no one stocks them, except perhaps marine dealers at an expense price, but Kath Auto on Rice Street can order them for $2.89 each without a prepayment. Just for your information on trying to get less popular NGK plugs.
« Last Edit: August 10, 2012, 08:58:22 PM by David CVX-16 »
David
87' CVX-16, 85' 115 HP Johnson, 58.8 MPH GPS w/ 23" SRX Prop

Offline David CVX-16

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Re: 1987 Glastron/Carlson CVX-16
« Reply #228 on: September 06, 2012, 10:23:01 PM »
I have settled in on the OMC 20" pitch and 22" pitch Rakers being the best performance prop for my CVX-16 with a 115 HP Johnson. So now I am thinning the blades of a 22" Raker, making the leading edges sharp, and making the sharp edge extend to the hub.

It will be interesting to GPS this thinned blade 22" Raker against my factory original 22" Raker, both used but like new.
« Last Edit: September 06, 2012, 11:17:30 PM by David CVX-16 »
David
87' CVX-16, 85' 115 HP Johnson, 58.8 MPH GPS w/ 23" SRX Prop

Offline David CVX-16

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Re: 1987 Glastron/Carlson CVX-16
« Reply #229 on: September 07, 2012, 05:23:08 PM »
Finished the prop by using wet and dry sandpaper 220,320,400,600,800,1000, and then mother's aluminum and alloy polish. Edges are much sharper than before.
David
87' CVX-16, 85' 115 HP Johnson, 58.8 MPH GPS w/ 23" SRX Prop

Offline David CVX-16

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Re: 1987 Glastron/Carlson CVX-16
« Reply #230 on: October 10, 2012, 06:26:52 PM »
Finally got out on the water on White Bear Lake to test the 22" Raker props, one stock and one with thinned blades. Raker blades are thin in the first place, but I made them sharper. The thinned blade ran 54.8 MPH and the stock 55.0 MPH, too close to draw any conclusions, other than thinning makes little difference.

Boat's speedometer was pegging 60 MPH with RPM's around 5,400 to 5,500 - right at factory redline.

Next project will be to replace the steering in the spring as the steering wheel has way too much play. 

All in all, a satisfying boating season for me - sold the V-153 to the right buyer, purchased and fixed up the CVX16, determined the best prop, going faster than the V-153, disabled the oil blending system (VRO) after almost ruining the engine because of a disconnected oil line, and a fair number of boat trips on the Mississippi and St. Croix with the Glastron group and family. 
David
87' CVX-16, 85' 115 HP Johnson, 58.8 MPH GPS w/ 23" SRX Prop

Online Hyperacme

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Re: 1987 Glastron/Carlson CVX-16
« Reply #231 on: October 10, 2012, 06:44:50 PM »
WAHOO !
55 mph is AWESOME Dave !
You get any frost bite ?
Was kind of cool today ...

Give me a call when your ready to do your steering, I've done enough of them to be an expert ... LOL

Offline Jason

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Re: 1987 Glastron/Carlson CVX-16
« Reply #232 on: October 10, 2012, 06:48:28 PM »
Nice numbers dave! i bet you had the entire lake to yourself too.
Jason S.
1974 Glastron Carlson CV16SS 140 I/O
1986 Glastron Carlson CV23 260 I/O

Offline V153

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Re: 1987 Glastron/Carlson CVX-16
« Reply #233 on: October 10, 2012, 07:45:02 PM »
Ehh big deal, my V153 did 54.8 with a 90... Heh heh heh

Just kidding David. Yer CVX is a lil heavier. Nice numbers!
'81 C500_given away, bought back_75.1 mph
'81 Baja 15SS_140 Frankenrude_66.7 mph
'70 something SpeedCraft_(Allison 16R Clone)_69.0 mph
'79 CVZ19_given away
'71 V153_54.8 mph_wrecked


WALK TALL AND CARRY A BIG BILGE PUMP

Offline 84carlson

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Re: 1987 Glastron/Carlson CVX-16
« Reply #234 on: October 10, 2012, 07:55:55 PM »

I should do some more testing, were running the same Boat and Motor, with a 19" prop, I'm getting 48-49 I wish I had your ambition to get a little more speed, maybe next year.  One question have you raised your motor at all?

Joe



Offline 75starflight

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Re: 1987 Glastron/Carlson CVX-16
« Reply #235 on: October 10, 2012, 08:05:14 PM »
Joe, plenty of time for testing next spring. We need to do a prop testing day at branched oak, I have several I need to try. Watch ebay, you can find some good deals. That is where I bought all 4 of the ones I want to try when the rebuild is done on the Phoenix. I paid around $100.00 for each of them.
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Offline 84carlson

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Re: 1987 Glastron/Carlson CVX-16
« Reply #236 on: October 10, 2012, 08:15:13 PM »
We will definitely do that, hopefully there will be some water in the lakes...we might need to sell the boats for campers if the weather does not change around here.

joe

Offline MarkS

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Re: 1987 Glastron/Carlson CVX-16
« Reply #237 on: October 11, 2012, 04:23:31 AM »
Quote
All in all, a satisfying boating season for me....
I'd say so, and it couldn't happen to a nicer guy.  Congrats on the big numbers there David, pretty impressive IMHO!  Equally impressive is the gorgeous appearance of your new CVX ride now, you "set the bar" way up there.  Aside from the steering upgrade, she's ready for action when she comes out of moth balls next spring, how much better can it get!??!  Good job my friend.
Mark
1978 SSV-176

Offline David CVX-16

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Re: 1987 Glastron/Carlson CVX-16
« Reply #238 on: October 11, 2012, 09:34:47 PM »
White Bear Lake had about five boats on the lake, people taking their pontoon boats off the lake, a few fisherman, a pleasure rider, and a small sailboat race between 4 boats.

Gregg, yes I would appreciate your experience and knowledge of steering systems. That will be my "the nightmare begins". First step, remove the two front seats and the console.

The motor is 3/4" off the transom. The boat is very sable and easy to drive at full speed, much easier than the V-153, as the boat is riding on a pad. As the boat accelerates, the boat pops onto the pad, like shifting into a higher gear, much looser and faster acceleration at that point. There is no chinewalking even though the steering has 2 inches of free play. The boat is not sensative to motor trim angle, as more trim angle results in a rooster tail, but not more bow lift.

I was using Champion surface gap plugs, number L78V, but have other Champion and NGK plugs to test.  
« Last Edit: October 11, 2012, 10:46:34 PM by David CVX-16 »
David
87' CVX-16, 85' 115 HP Johnson, 58.8 MPH GPS w/ 23" SRX Prop

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Re: 1987 Glastron/Carlson CVX-16
« Reply #239 on: October 12, 2012, 07:21:53 AM »
The Baystar or NFB shouldn't be to hard to do, few hours tops.
Removing everything to get at it will take longer ...