• 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 Module

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.
See more
See less

Force 120hp L-drive... need help

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

  • Force 120hp L-drive... need help

    I've read a lot of the discussions about problems with L-drive so I know its a sore subject but here goes.
    I believe I messed up my engine by forgetting to put oil in... I ran it pretty hard (pulling a tube) for about 15-20 mins, then stopped and put in the oil. It ran great for the rest of the day but the next day I heard a small pop and lost a lot of power, could only get 10-15 mph. Long story short it scored 2 cylinders and I only had about 30 psi head pressure in one of them. I purchased a rebuilt power head, installed it and can not get it to start. It seems that I am not getting fuel to the carbs, I disconnected the hoses and "no fuel". Reading the description and operation of the fuel pump in the Clymer shop manual its a bladder/vacuum/pressure operation. I replaced the bladder and the main check valve no help, I still do not really understand how it works. With the pump removed as I spin the eng there is only a small very slight puff of air coming out of the port (the small hole in the block that the pump backs up to) the way the book reads I would think the air coming out should be quite strong and I should also feel a vacuum. There is hose also coming out of the block connected to the other side of the pump, and from that I feel no suction or pressure. Is there something wrong with the new eng or am I doing something wrong? BTW I verified it has spark to all 4 cylinders.

  • #2
    Re: Force 120hp L-drive... need help

    Welcome to iboats forums.

    Can't really help you with an answer, but you might try a new title for the thread.

    Something like "help with fuel pump"

    Place it in the Mercury or the Force forum as the pump is common to both makes, and not specific to L-drives.
    Medford, WI


    • #3
      Re: Force 120hp L-drive... need help

      You won't feel much air - needs a liquid. Disconnect outlet hose and crank engine. Gas should flow. It's easy to hook these up backwards.