Guests - If You want access to member only forums on HSO. You will gain access only when you Sign-in or Sign-Up on HotSpotOutdoors.

It's easy - LOOK UPPER right menu.

Sign in to follow this  
Followers 0
muskyfever

problem with Merc 150 EFI

8 posts in this topic

My 1994 Merc 150 EFI will just cut out on me whether I am idling slowly or full speed. It's like the dead man switch is used, it's that quick. It always starts right up again without a problem. Had it in to the dealer last fall and of course they could not duplicate the problem. Anyone out there have that happen before? Any suggestions besides buying a new motor? Thanks

Share this post


Link to post
Share on other sites

Some optis have had issues where the pins inside the electrical connectors get bent or mushed, the mechanics will straighten or spread the pins and use dielectric grease to ensure a good connection. Not sure if that's what's going on with your motor, hopefully your mechanics would know about that.

Share this post


Link to post
Share on other sites

Do stators go in and out? I don't think so, I think if they are bad they are like a dead lightbulb, but if it just plains "stops" that sounds like what happens when a stator is out.

Did you check the super easy things, like good connections to battery and the motor?

Good luck, wish I could help you. Our 97 is so far so goooooood.

Share this post


Link to post
Share on other sites

Those types of problems can be difficult to pin point. It could be the kill switch, safety switch, poor connection as PJ mentioned, power to the injectors, it could be the ECM. It's just tough to put a finger on it.

Share this post


Link to post
Share on other sites

It might be a fuel delivery issue as well. I had the same problem (1999 200 EFI, non "opti")and I found a loose threaded fitting that allowed air to be sucked into the fuel stream. Once the fitting was resealed and tightened the problem has not recurred.

Share this post


Link to post
Share on other sites

I have a '94 175 EFI Merc, and I did have a similar incidents last summer. It usually occurred on hot days. My only guess was a fuel delivery issue, like vapor lock. The motor would suddenly die at all RPMs....full throttle, idle, but I had to pump the bulb a few times.

Do you have to pump the fuel line bulb to start it?

I never did anything about it since I noticed it only happened on really hot days.

I haven't had a problem this summer.

Share this post


Link to post
Share on other sites

Sounds like the voltage regulator which supplies power to the fuel pump. My 1997 EFI did the same thing and the boat mechanic I use told me this was a common failure in Merc EFI motors.

Share this post


Link to post
Share on other sites

Thanks to all of you with your suggestions. This is a difficult problem to nail down and all of these suggestions will help when I take it in to the mechanic again. Musky Fever

Share this post


Link to post
Share on other sites
Guest
This topic is now closed to further replies.
Sign in to follow this  
Followers 0



  • Posts

    • Definitely plan on doing some pulling by hand ealry ice so I'm thinking the cabin it is then. Thanks for the tips and info on the otters and equipment it's been a very big help!
    • Yep, I've contacted 4 or 5 campgrounds in the last couple of days. One has gotten back to me, the rest have not yet.   We will be up that way over the Labor Day holiday so we can check out a few campgrounds while we are there. We actually checked out 2 or 3 while we were up there last year at that time.   I'm not too sure if we are ready to take the plunge yet or not but we are close.
    •   If you are start talking to the owners of the campgrounds now about letting you know when there may be an opening. Ours fills up during the summer but at the end of the season the owners will start hearing about those that will be moving out at the end of the year. Lot's of relatives will tell their families as soon as they hear someone is moving out. Good Luck.
    • Thanks guys. Looks like there are a few lakes to checkout.
    • I really hope the wolves aren't seriously considering this. You take LeBron James off the cavs, and Irving leads them to an 8 seed in the east, at best! This is going to be KAT's team for years to come, so if Irving is looking to be top dog, it certainly won't be here! Personally, I don't think he'll be traded. If the lakers show any sign of improvement in this upcoming season, LeBron will be leaving to go there anyway, so Irving just needs to be patient and he'll be he top guy again.
    • We're definitely checking out our options in a couple of areas we like but I'm not sure if it will happen as early as next year or not.
    • Definitely something to be said about parking it an leaving.  My fees are nothing except the bills I help pay for at the family cabin.  Would hate hooking and unhooking all the time.
    • Still have my old sno-boat. Best portable shelter out there for pulling by hand. You scored a heck of a deal! I feel mine is irreplaceable! I don't use it much, but when I do, I'm so glad I have taken care of it and still have it 16 years later. I've had 1 zipper replaced on the D-door and some patching done at Canvas Craft years ago.  I think the other zipper is on it's way out, and will definitely get that repaired when needed. 
    • If you planning on doing any hand pulling at all then do not get the lodge she is a tank and would not fit in a short box. As long as your not 300+ lbs you'll be perfectly comfortable with 2 adults in the cabin. Also a cheap alternative to Hifax are a set of old downhill skis (normally $7-15 @ goodwill) I pull mine across parking lots all the time behind the wheeler and they hold up really well. An added bonus is if you cut them off at the end of the sled then they work great for loading and unloading the shack from your pickup box by yourself because the steel sides dig into the ground a bit keeping the bottom from sliding out.
    • tip to a couple good friends   Len,
      Thank you for the stream recommendation, Len! I love the layout of this stream. Fished it from 3pm until 6:30pm.  My brother threw panther 9s and I threw 6s. We scored a brookie/brown/bow trifecta.    
  • Our Sponsors