Like Tree9Likes

Found the 900SC Cam Card

Reply

Old 01-11-2018, 03:55 PM
  #21
Platinum Member
Platinum Member
iTrader: (7)
 
getrdunn's Avatar
 
Join Date: Feb 2009
Location: NW Michigan
My Boat: 12 meter
Posts: 5,441
Default

I got my blowers, cams etc from Dennis r. Extremely low hours as in you almost can't even tell the cams have been run however he said they were set at .020 and show no signs of any wear on the lifters or cams. Personally I typically go by the cam card for known reasons however I will be setting these up as they were. .020. It's gotta be the way the roller rides on the lobe and as we know there differences in lobe profiles. I wouldn't exactly consider that 900 cam to be an endurance cam with the fast opening and closing rates. I would imagine merc knew that and planned on ongoing maintenance but it makes good power also. Some use it in NA engines with excellent results.

I would bet the the majority of the guys buying boats knew with merc SC engines get the majority of their maintenance etc done by merc authorized dealers but I could be wrong.
getrdunn is offline  
Reply With Quote
Old 01-15-2018, 02:28 PM
  #22
Registered
 
Join Date: May 2007
Location: On a Boat
My Boat: Looking for a Cat now, wife says Deep V
Posts: 517
Default Valve lash

Service manual sets both intake and exhaust at .016 cold
getrdunn likes this.
tunertech is offline  
Reply With Quote
Old 01-15-2018, 07:55 PM
  #23
Platinum Member
Platinum Member
iTrader: (7)
 
getrdunn's Avatar
 
Join Date: Feb 2009
Location: NW Michigan
My Boat: 12 meter
Posts: 5,441
Default

Originally Posted by tunertech View Post
Service manual sets both intake and exhaust at .016 cold
Might be a little trial and error if I use these .016 cold should be around .022 hot. At least from my experience. What heads cme on the 900's? I've got time yet on cams and a lot on my plate at the moment but have a couple other options with cams. I can tame the cam choice/grind down and ease up on valvetrain likely make more power.

Who knows for sure.
29 FOUNTAIN FUN likes this.

Last edited by getrdunn; 01-15-2018 at 07:58 PM.
getrdunn is offline  
Reply With Quote

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


OSO Sponsor
OSO Advertiser
OSO Advertiser
OSO Advertiser