Author Topic: Say hello to my C-512 Metric :-)  (Read 863 times)

0 Members and 1 Guest are viewing this topic.

Offline dszczucinski

  • Jr. Member
  • **
  • Posts: 36
Say hello to my C-512 Metric :-)
« on: May 14, 2018, 03:16:41 PM »
Hey all,

My friend and I have owned this boat for the past 5-6 years or so. It is a 1981 C-512 Metric (or so we think). Two tone blue, no metal flake (I haven't seen another without the flake). Although we are not from your area (Kansas here), this seemed to be a great group full of knowledgeable people!

I do have a couple of questions for everyone. Our boat has the Mercruiser 120, and really only goes about 35 mph. I have been trying to research prop sizes for this motor and top speeds, but it seems the 512 is somewhat rare. Our current prop is pretty rough around the edges, but is this speed typical for a boat like this?


Offline Plugcheck

  • Donate members 2018
  • Hero Member
  • *****
  • Posts: 2503
Re: Say hello to my C-512 Metric :-)
« Reply #1 on: May 14, 2018, 03:33:19 PM »
        Seems a bit low on the top speed.   I had a 1980 CVX16-SS with 140 Mercruiser and it would do around 45mph, around 50 in perfect conditions.   Could be the prop is chewed up enough to not being able to do its job well.  Any chance you could try other props?    When at top speed, what RPM's is the engine turning?
Michael
1979 CVZ-18 388 CI Vortec Mouse
1980 CVX-16SS 140 Mercruiser
1979 CVX-16 Johnson 175
2002 Bennington 2275CC 90 Mercury
1985 Intimidator project
1989 Lowe 200 Redneck fishin Toon
2001 Godfrey Sweetwater pontoon 115 Rude

Offline dszczucinski

  • Jr. Member
  • **
  • Posts: 36
Re: Say hello to my C-512 Metric :-)
« Reply #2 on: May 14, 2018, 04:03:48 PM »
Turning about 4200 rpm at WOT. The prop is a little chewed up, we have never replaced it. I can't find any markings on the current prop, so I am unsure the specifications. What is the standard prop for this boat?

Offline 75starflight

  • Hero Member
  • *****
  • Posts: 3362
Re: Say hello to my C-512 Metric :-)
« Reply #3 on: May 14, 2018, 04:38:19 PM »
When I had a 120 in my v179 tri-hull I could only achieve 38 mph with a 21p laser ii prop. and that was around 4500 rpm at wot.

In my book you are probably in the top range for Speed with the 120.

When I switched over to a 140 in my V179 I am now able to consistently reach 43 to 45 mph and have peaked at 48 mph once.  This is with the Same laser II prop.

Oh, Welcome to the group!

Btw, I am located in Nebraska
« Last Edit: May 14, 2018, 04:40:01 PM by 75starflight »
1975 v-179 starflite 
1978 CVZ-18

Offline dorelse

  • Administrator
  • Hero Member
  • *****
  • Posts: 5794
Re: Say hello to my C-512 Metric :-)
« Reply #4 on: May 14, 2018, 08:38:56 PM »
Hmm...there is another two tone blue in the club.  @C512Jim

My Metric had the 140 in it...I could only get low 40's out of it.  Nice boats.  Welcome!
1990 Sierra 1700

Offline C512Jim

  • Sr. Member
  • ****
  • Posts: 158
Re: Say hello to my C-512 Metric :-)
« Reply #5 on: May 15, 2018, 05:47:33 AM »
Wow, we have a twin out there.  We thought we were the only one ourselves.  Just gave the boat to my youngest son, has been a fun and inexpensive boat for the past 6 years.  With just me and a standard aluminum (M) E 3x15x17r  prop we have always had on it will do 41 on calm day trimmed out.  The wild thing is My wife, a friend, Myself, 40lb dog, and medium size cooler will always top out at 37mph on the gauge (We are all 200lb plus people too).  We even gps'd it a couple times and it's the only boat I have that the dash speedo is dead on. The Rpms are perfect with that prop. Will miss her like I am sure Dorsel will miss his, but that leaves new adventures open in the Glastron family.  If you want to see his better our oldest son put on a couple videos of it under the name Glastron Fever at youtube.  Would love to see photos of yours and see if anything is different that ours or other Metrics.

Offline Hyperacme

  • Administrator
  • Hero Member
  • *****
  • Posts: 11349
Re: Say hello to my C-512 Metric :-)
« Reply #6 on: May 15, 2018, 07:13:45 AM »
Welcome to the forum !
Gregg
'76 CV16

Offline dszczucinski

  • Jr. Member
  • **
  • Posts: 36
Re: Say hello to my C-512 Metric :-)
« Reply #7 on: May 15, 2018, 08:05:56 AM »
Hey all!

Thank you for the welcome and it's good to see we aren't the only blue C512! We bought the boat about 6 years ago for $1100, wouldn't shift when we bought it but a small adjustment to the cable and we were back in business. Over the past few years she really hasn't need much more than minor repairs here and there (although this winter we may rebuild the entire interior.)

@C512Jim we have changed ours up a little bit, but it originally looked just like yours (like exactly). Our seats fell apart and we never had a windshield :-( So we built a L-shaped sectional as we are all pretty tall and like the extra lounge space. I don't have the best pictures on my phone but here are a couple.


Offline C512Jim

  • Sr. Member
  • ****
  • Posts: 158
Re: Say hello to my C-512 Metric :-)
« Reply #8 on: May 15, 2018, 09:03:52 AM »
The guys here helped me out with the same issue of linkage out of adjustment where going into forward would clunk a few times till grabbed.  I barely moved the adjustment and its worked perfect since.  I was lucky, I got mine just as you see it in the photos for $200 with the original trailer.  We have enjoyed it for 6 years solid with very little issues, and it is so good on gas.  We enjoy The torch lake sandbar here in northern michigan, not into the crazy part of it but like it when its more relaxed.  Almost every time we leave the boat to swim or talk to someone we come back and there is  group of people standing around it. lol.  Sounds like you have had tons of fun like us.  I have had a 1970 Glastron Caribbean V234 since 1991 but it was after getting the C512 metric I got addicted to All the Glastrons. lol.

Offline dszczucinski

  • Jr. Member
  • **
  • Posts: 36
Re: Say hello to my C-512 Metric :-)
« Reply #9 on: May 15, 2018, 09:08:38 AM »
Hey @C512Jim,

We had the entire shift cable replaced, but we still get some clunks when shifting into forward gear, what adjustments did you make to really dial it in? Also, any ideas where to buy a windshield?

I am taking the prop off today or tomorrow to get it replaced, so I am hoping that will solve our top speed problem as we can barely crack 35 mph. I am fairly certain we have the 120 as well.

Offline C512Jim

  • Sr. Member
  • ****
  • Posts: 158
Re: Say hello to my C-512 Metric :-)
« Reply #10 on: May 15, 2018, 09:22:37 AM »
All I did was adjust the brass hold down piece at the rear of the motor maybe only one or two turns if I remember right.  Cant remember which direction but like they told me here go one way, see what it does, if worse go back to where it was and go the other direction.  Worked for me.  About your windshield I think there are links on here of after market people that make them.  The 81 metric has a very nice original one, but always nervous about something happening to it.  This spring I visited my cousin in Kansas and adopted an 82 metric I believe, it has the 140 hp merc.  I have a good donor out of a 4 winns that will go into it but have to redo all the interior, surprisingly the floor is solid.  Will need lots of work trying to bring back the finish.  That windshield almost seems like it might have been a re manufactured one. 
« Last Edit: May 15, 2018, 09:26:40 AM by C512Jim »

Offline dszczucinski

  • Jr. Member
  • **
  • Posts: 36
Re: Say hello to my C-512 Metric :-)
« Reply #11 on: May 15, 2018, 09:45:25 AM »
@C512Jim that one looks fabulous! We definitely enjoy all the looks we get and random conversations. The windshield has never been a big deal to us as we like to climb all over the boat and lay on the front.

Offline C512Jim

  • Sr. Member
  • ****
  • Posts: 158
Re: Say hello to my C-512 Metric :-)
« Reply #12 on: May 15, 2018, 10:28:55 AM »
Thanks, the photos make it look way better than it is, tons of heavy oxidation but think it can be saved with some touch up.