• 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.
  • ALL iboats Forum Members and Guests:
    To show our appreciation for your participation in the Forums, we're offering an exclusive Forums-only discount good for an additional 5% off your iboats.com order for a limited time.
    To redeem, simply call our Customer Service Team at 800-914-1123 (Open M-F, 9am - 8pm Eastern Time) and mention the Forums 5% off discount. Offer excludes engines, trolling motors, and electronics.

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 threads or hijack existing threads. Old threads of a technical nature are like a library book, Please do not write in them.

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

3. Do not take over someone elseís thread (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 thread of your own.

4. If you have a question for the original poster (OP) and the thread 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 thread.

5. By starting your own thread, 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 thread. And those answers will be specific to your particular issue.

6. Please do not post to threads that have been inactive for more than 3 months unless you are the original poster. We have very active forums and any thread 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 thread.

7. Posting at the end of any thread is considered to be hijacking the original posters thread which in turn subjects the thread 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 thread asking you not to reply to old threads. The Red banner will read: Please note this thread has been inactive for 90 days. For the best results, please start a new thread.

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

early 1980s mariner 80 dont wanna idle and bogs out at full throttle

Page Title Module
Move Remove Collapse
X
Conversation Detail Module
Collapse
  • Filter
  • Time
  • Show
Clear All
new posts


  • early 1980s mariner 80 dont wanna idle and bogs out at full throttle

    ok guys srry for another ? but i have a 80 horse mariner that dont wanna idle unless i play with the choke and wont run under a load unless i play with the choke . i pulled the carbs off yesterday and they were spotless inside so i cleaned and blew them out with a compressor then reinstalled them and it seemed to run worse and if not then just about the same . i pulled the plugs cleaned them and i notice one of them wasnt as dirty as the others. i had my buddy see if i was getting spark to all of them and he said i sure was nice blue spark . so i took her down to the river and fired her up she wont start unless u give her half throttle and wont stay running unless its in nutral and at half throttle the minute u put it in gear it will run for a seconed then it boggs out but if i put it in gear then hit the choke on and off it comes out almost just fine then once it reaches top speed around 30 it will run fine till u back off the throttle to slow down then it stalls out . any ideas guys i work on motorcycles and cars but never on a boat its a little diff so im not completely dumb on this but i needs some help !

    thanks so much michael


  • #2
    Re: early 1980s mariner 80 dont wanna idle and bogs out at full throttle

    I think you have two related problems. First perform the "link and synch for merc inlines" that is posted as a sticky. This will get your carbs synched with the spark advance.

    Next you need to adjust the idle mixture. Start with the idle mix needles open 1-1/2 turns from lightly seated. The motor should run fine on this setting in neutral. Now put it in gear and try to accelerate. If it bogs or stalls, open the top carb 1/8 turn and try again. Repeat with bottom carb, then top carb, ect, testing after each adjustment. Eventually you will find a setting that allows reasonable idle, and good smooth acceleration.

    Comment

    Working...
    X