• If this is your first visit to the iboats.com Boating Forums, be sure to check out the FAQ. To post a question or comment, begin by signing up. To start viewing messages, select the forum that you want to visit from the selection below.


Announcement

Announcement Module
Collapse

Help Tip: If you have a question that has not been answered to your satisfaction in the archives, it is always best to start a new thread of your own. By starting your own thread, you will receive the maximum number of views by forum members.

Below are some additional forum policies in hopes of all iboats members will follow, Thank you.

1. Please do not reply to old topics or hijack existing topics. Old topics of a technical nature are like a library book, Please do not write in them.

2. Old topics should be considered archives and used for reference only. Please do not reply to them.

3. Do not take over someone elseís topic (aka hijack) with your own question, even if it is similar. If you have a question that has not been covered to your satisfaction in the archives, it is always best to start a new topic of your own.

4. If you have a question for the original poster (OP) and the topic is over 30 days old, send the OP a PM, he may not even visit the forums any longer, or may not notice your question in the old topic.

5. By starting your own topic, you will receive the maximum number of views by forum helpers that may not even notice your question when itís posted at the end of someone elseís topic. And those answers will be specific to your particular issue.

6. Please do not post to topics that have been inactive for more than 3 months unless you are the original poster. We have very active forums and any topic that remains inactive for that long should be considered "dead". It is especially confusing when there is an entirely new question posted to an old topic.

7. Posting at the end of any topic is considered to be hijacking the original posters topic which in turn subjects the topic to be closed if it continues to happen thus not making it fair to the original poster in the future had for some reason he/she needed to return for additional information or provide an update of the problem solved which is always welcomed within a reasonable amount of time frame.

8. Please note that you should see a red banner pop up near the bottom of each inactive topic asking you not to reply to old topics. The Red banner will read: Please note this topic has been inactive for 90 days. For the best results, please start a new topic.

Thank you all in advance for doing your part in helping iboats run a smooth ship.

Additional forum rules linked below.
http://forums.iboats.com/forum-rules-guidelines-405/
See more
See less

Rochester 2bbl carb

Page Title Module
Move Remove Collapse
This topic is closed.
X
X
Conversation Detail Module
Collapse
  • Filter
  • Time
  • Show
Clear All
new posts


  • Rochester 2bbl carb

    Replaced my 1982 2.5L Mercruiser with a new 3.0L long block and now I think it is time to tackle the carburetor. I'm positive the carb is shot - mixture screws do nothing and i'm getting gas residue around the throttle.

    The carb number is 17059054.

    My question - i've found a few remanufactured carbs (i.e. Sierra 18-7609) on the internet - are these any good? I'd prefer to replace the carb rather than try to rebuild (summer is quickly passing me by) but I want to make sure that a re-manufactured is the way to go. Are these completely rebuilt to factory specs? Anything I should watch out for? Should I look at other brands and if so - where?

    I'd appreciate any comments or suggestions.

    Thanks !


  • #2
    Re: Rochester 2bbl carb

    Your carb is about as easy a rebuild as you will find and the kit is way less $$ than a remanufactured carb. Worst case is you will have to get a new/reman carb later if it does not work well. Should only take 24 hours if you let it soak in carb cleaner all night. NOTE: This model carb is notorious for a sticking choke resulting from a distorted throat caused by repeated tightening of the air filter/flame arrestor hold-down nut. I always have been able to save them by filing the edges of the choke plate to fit the throat. Good luck!
    Last edited by Willyclay; July 21st, 2008, 11:21 PM. Reason: Spelling
    Old geezer who never worked a day as a professional in the marine industry but has been fooling with outboard motors for 55+ years!

    Comment



    • #3
      Re: Rochester 2bbl carb

      I second that. Just rebuilt mine and its a breeze. works great now.
      1984 Cobia Charger, 120 Mercruiser/Alpha 1

      Comment



      • #4
        Re: Rochester 2bbl carb

        Are these completely rebuilt to factory specs? Anything I should watch out for?
        Ayuh,.... Just make sure you buy the Right 1....
        Any Grease is Better,..... Than No Grease at All.......

        Comment



        • #5
          Re: Rochester 2bbl carb

          I have an 87 Mercruiser 175. THe tag on the carb is MCM175/3304-9565.
          I rebuilt it, but afer runnning for a little bit, I get gas leaking from the bottom. At this point I really just want to replace it.

          I talked to ******************** and they don't have my numbers. THey say mine are for a Mercruiser Carb and they only do Rochesters. Can anyone tell me which Rochester will fir. From loking at the pic on their site, I don't see any difference. (fittigs, location of elec choke, fuel inlet, etc)

          Thank You in advance.

          Comment



          • #6
            Re: Rochester 2bbl carb

            Another question on rebuilding: My manual mentions checking the throttle shaft to determine if it is worn or loose - and if so to replace the entire throttle body. A mechanic actually warned me not to rebuild for this very reason. He said there may be shafts, bushings, etc that need to be replaced that aren't part of a kit. Does this make sense and how available are these "extra" parts?

            Thanks.

            Comment



            • #7
              Re: Rochester 2bbl carb

              I guess if you want to be real anal about it (not meant to be a nock). You really can't loose by trying. If it doesn't work, you aren't out much. I've done mine several times, and it runs great.
              1984 Cobia Charger, 120 Mercruiser/Alpha 1

              Comment



              • #8
                Re: Rochester 2bbl carb

                On the other hand, going the reman carb route isn't without its problems! Bond-0 already flagged the challenge of getting the correct carb. Even if you get the correct one, it may have issues like missing or improper parts that will require another removal and replacement, not to mention the hassle factor. I'll wager you could go to a large auto salvage yard and get a bucket of Rochester 2-barrels for a few bucks so you could mix and match parts until you like the end result. But I'm an old guy and think like that!
                Old geezer who never worked a day as a professional in the marine industry but has been fooling with outboard motors for 55+ years!

                Comment



                • #9
                  Re: Rochester 2bbl carb

                  I ordered a reman carb off the internet. My boat had the Mercarb on it so that is was I purchased. When UPS came I opened the box and recieved a Rochester 2 Barrel. I called and they tsaid it was the same carb. After about fifteen minutes of telling him it's not the same I just decided to keep it. Everything on the carb is the same as the Mercarb, but you get two mixture screws. I only wanted what I paid for, if I wanted a Roch I would have ordered a Roch.
                  1989 Monterey 1900 Cuddy Cabin $1500.00 project that turned into a $10,000 project over three years.

                  New trailer,New Motor,Gimbal Ring,Trim Pump Assembly, Deck,Stringers,Fuel Tank, Interior and on.....

                  Comment



                  • #10
                    Re: Rochester 2bbl carb

                    Do you have the numbers on the Rochester? WHo did you get it from>? Thanks,
                    I am finding them from $217 up to $605!!!

                    Comment



                    • #11
                      Re: Rochester 2bbl carb

                      OK - It seemed like the majority opinion was that I should rebuild - so the carb is in pieces on my workbench and will soon be soaking.

                      I've been looking around for a rebuilt kit and Autozone told me that the kit for my carb (17029054) was GP Sorensen 96-670. I remember my repair manual warning against using automotive gaskets because they can weep gas, but since this kit seems to be for my exact carb should I assume that it is OK for a marine application?

                      As far as I could tell, the OEM kit is 823427A1.

                      Thanks,

                      Comment



                      • #12
                        Re: Rochester 2bbl carb

                        That may be more of a problem on a Holley carb because of their design. I can't see it being a problem on your carb. By the way I just rebuilt a Merc (almost the same as your Rochester) using a marine kit and the gaskets didn't look any different than the ones I used to put in cars years ago.

                        Comment



                        • #13
                          Re: Rochester 2bbl carb

                          Soak that sucker overnight in some acetone. Make sure you blow it dry with compressed air. Make sure every little hole is CLEAN. Hold it up to the sunlight.

                          Every hole is clean. I know i wrote it twice. Replace the ball bearing. And make sure the accelarator pump fits tight.

                          Been doing this a long time first one i was 13, 1959 triumph.

                          Comment



                          • #14
                            Re: Rochester 2bbl carb

                            Us old guys like to use Permatex (non-hardening) on gasket surfaces to insure we only have to do the job once. Good luck!
                            Old geezer who never worked a day as a professional in the marine industry but has been fooling with outboard motors for 55+ years!

                            Comment



                            • #15
                              Re: Rochester 2bbl carb

                              Good idea the permatex just a drop. Keep the gaskets from moving.

                              However he might have to take it apart again being it's his first time.

                              Maybe the float isn't right, maybe all the holes not clean.

                              May i suggest sir; you run it from a external tank with CLEAN FRESH GAS.

                              Comment

                              Working...
                              X