Jetting a Quadrajet for OMC 5.7 1989

[concentric]

My engine do not rev enough (4000 should be 4400). After ruleing out props etc, I?m now checking up my carb.
The Quadra jet sits on a 350 OMC 1989 260 hp (boat fourwinn sundowner 215).
Carb number 17059286 0633W
Primary rods 45
Primary jets 73
Secondary rods CM C4
Hanger E
power valve spring hight 0.85

What are the standard specs, is this OK?
Little suspicious abot the secondary rod, strange numbers there.

 

[45Auto]

Re: Jetting a Quadrajet for OMC 5.7 1989

Exactly how did you rule out props????

Do you think the jetting on your carb magically changed??

Don't have an OMC manual handy, but a 1989 Mercruiser 5.7L 260 with a Quadrajet came stock with .068 primary jets, .041 primary metering rods and CL secondary rods.

 

[concentric]

Re: Jetting a Quadrajet for OMC 5.7 1989

45auto thanks for info.

I had some help from hwsii and ended up with "probably motor issue".
http://forums.iboats.com/showthread.php?t=389573

Nevertheless a new prop is orderd (hustler), meanwhile i try to sort out the the other components.

just bought the seloc manual but sadly they doesnt state the specs for the Quadra, only for the Holly.

 

[wire2]

Re: Jetting a Quadrajet for OMC 5.7 1989

What prop is on it now? Is it in good condition?

I also run a 5.7/260 on a 19' Glastron, it came with a 14? x 21. After some engine mods it reved to 5500, so i changed it to a 23", revs to 5000 now.

 

[concentric]

Re: Jetting a Quadrajet for OMC 5.7 1989

Current prop is Michigan Whell 14 1/2 x 19 good condition, but I will try turningpoint Hustler 14 1/4 x 19 anyway. Hopefully more revs and little bit more speed.

Do you have your original carb specs at handy?
What engie mods did you do to jump up 1000 rpms from standard?