• 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

Honda 90 warm start intermittant problem?

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


  • Honda 90 warm start intermittant problem?

    Hello, we have a 1999 Honda BF90 4 stroke with a very frustrating problem. Cold start is fine. But warm starts are problematic. Makes the motor undependable and has put us in danger twice.The problem happens after running the BF90 some miles and then shutting it off to either troll around with a 8hp or anchor up.When you attempt to start it - it turns over, sputters just slightly and that's it. Cranking more it just spins, no pop. Seems like it's not getting fuel. Originally, because of the initial pop I thought I was flooding the engine but I don't think so.I was told to disconnect the fuel line from the 90hp if we were going to troll ahwile, to stop the vacuum of the trolling motor from sucking the fuel back out of the 90. The last time we had this problem we forgot to disconnect. (The two motors share a common fuel line, that goes to a T-fitting, where it is split into a fuel line for each motor. Each motor's line has a fuel bulb in it.)We did however, pump up the fuel bulb of the 90 real good before trying to start it.Generally if we wait 15 - 30 minutes after the initial starting failure, and after considerable cranking we can get the 90 to start. Any ideas?Can some sort of vacuum lock be created if the trolling motor did suck the fuel out of the 90?Really look forward to your ideas!PS. of course the dealer has had the motor back a number of times and can't diagnose a problem.


  • #2
    Re: Honda 90 warm start intermittant problem?

    all major motor motor makers recomend either seperate suply lines all the way back to the tank or a three way selector valve but i dont think this is your starting problem . i have had the same problem on two diferent motors one 2 hp one 50 hp hondas both motors had intake valves that where too teight check the valve lash adjustment this may be your problem

    Comment



    • #3
      Re: Honda 90 warm start intermittant problem?

      Frank is right on both counts.This thing should ideally have a separate fuel source for the kicker or a way to isolate the engines like a gate valve at the water separator that I hope you also have.Valve adjustment is part of your regular maintainance and should be done every 100 hours.These valves get tighter as they wear and a tight exhaust valve will cause your exact symptoms.Hard starting warm.

      Comment



      • #4
        Re: Honda 90 warm start intermittant problem?

        Thank you very much OMCFrank and Hondon, in nearly three years no one has suggested that possible problem. Thanks too for suggesting - 'gate valve at the water separator' to isolate the supply lines. I'll check the marine store today. Thanks again for taking the time to reply!

        Comment



        • #5
          Re: Honda 90 warm start intermittant problem?

          I have had simular problems with my Merc 850. It starts fine cold, but when the motor is warm it is difficult to start. Could the tight valve be the problem on a Mercury?If so, could you elaborate on how I can adjust the value? I have minimal outboard maintenance knowledge.Thanks

          Comment



          • #6
            Re: Honda 90 warm start intermittant problem?

            Sorry Deeps,You have a two stroke. The Honda is a four stroke. Bear

            Comment

            Working...
            X