I’d like to buy my step dad a carburetor to replace the one on his 1981 Sea Ray boat. It’s got a Rochester 4 bbl with mechanical secondaries.
I’m not sure what size it is, or what to replace it with. It could be rebuilt, but the boat is already wrapped and stored for the winter, and I’d like to just replace it. It’s been more than 6 years since I’ve looked at a carburetor and I can’t remember anything other than the fact that I used to like Edelbrock. Any help would be appreciated.
Demon 1250 and make that bitch HAUL!!
make sure you buy a marine carb. Do you know if its the 230hp or the 260 hp motor?? these would have been your only choices in 1981 as far as the 350 is concerned. Your looking at least $350 for a reman carb.
Either rebuild it or check out the carb shop.
…or buy a brand new Edelbrock Quadrajet.
I’m 80% confident it is the 260hp motor. Does the marine carb use different materials?
WAY too much carb for that application.
Just buy a new Quadrajet from Summit or Jegs, they are usually about $299. Also replacing a carburetor with the wrong size will cause some headaches, so you just replace it with whats already on there, and it sounds like it’s a Quadrajet.
Oh I know its way too much, that was the point. :argue:
keep the q-jet
and they don’t have mechanical secondaries in the true sense
650 or 750, does it matter? Also, Holley and Edlebrock both make replacements…does it matter which for fitment?
The Holley 4175 is a direct bolt-on replacement for the Q-jets. Without knowing what cam/heads/mani I’d just stick with the 650.
Thanks
dont get me wrong a regular street carb will work on the boat but a marine carb is designed specifically for boat use. Marine carbs have no ports to accomodate carbon boxes and things like that, marine carbs are different if you use a street carb you are jeapodizing the safety of the boat and its occupants.
I strongly suggest that you either buy a rebuild kit which is probly best if you know someone that can do a quality rebuild or drop the coin for a reman carb from a reputable marine dealer.
Most Q-Jets are 750’s. I think thats the smallest cfm they were actually. I’d stick with a 750 since that motor is winding out on a boat.
Marine Carburetors
For use in marine applications, these Edelbrock carbs comply with U.S. Coast Guard safety standards. Cast surfaces are iridited with Teflon-coated shafts and pump arm for maximum protection. Other features include modified bowl venting, specially designed throttle shafts, accelerator pump seal, 3/8" inverted flare fuel inlet fitting, tube in airhorn for fuel pump vent, 5-1/8" flame arrestor flange, universal throttle lever and revised secondaries for improved transient performance. Note: These carbs have no vacuum ports and are not for auto use. Use our Carb Stud Kits #8008 or #8024 if needed, see
600 cfm, Electric Choke
CALIBRATED FOR PERFORMANCE
Designed and calibrated for optimum marine performance in small-block V8 engines with a variety of manifolds that include Edelbrock Performer, Performer RPM, RPM Air-Gap, Torker II and other brands of similar design. Also ideal for Chevy 4.3L V6 engines with a Performer manifold (see Manifolds) and Calibration Kit #1485. Comes with: Metering Jets – Primary .098, Secondary .101; Metering Rods – .068 x .047; Step-Up Spring – orange (5" Hg).
:wtf: is a carburator?
Their both good but if the Q-Jet works keep it. Q jets come in two sizes 750 and 800. Either is fine. The 800 has bigger primaries. Came on big Caddys and some other big block apps.