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
JRedig

1997 Merc 175 EFI Fuel Problem

5 posts in this topic

Hi Guys, i'm hopeful someone here can help point me in the right direction.

The above mentioned engine is new to me this year, very low hours when I bought it and it's spotless under the hood.

Today while running about 1/2 throttle it just died, slowly coming to a stop like it was running out of fuel. (middle of a big lake 2-3+ miles from the landing with wind howling...super fun) I've had something similar happen before on this boat and my previous rig, on the old boat it was always related to bad fuel. On this rig I think it was just due to low fuel and rough water equaling the fuel bouncing away from the pickup. Full tank of gas cured that one. It always restarted in the past and was able to keep going, today it would not.

After quite a bit of messing around, I figured out if I tilted the engine all the way up and pumped the primer bulb, fuel would purge from a hole near the intake tract on the left side of the engine and dribble down into the butterflys/throttle bodies (or at least this is the best theory I have at the moment)and then the engine would run for up to 6-8 seconds and die again. At that point, basically out of fuel and I could tilt up, prime, lower, start, go for 50 feet, repeat. It worked when the trolling motor batteries finally died, but a silly amount of wear on the starter i'm sure...

I had a spare fuel filter in the boat so we changed that on a just in case clause, but no change. But at least I know it's new now.

I have a lot of experience spinning wrenches on cars and fuel injection systems in general, just haven't messed with this engine at all yet. It seems like a pump or fuel feed issue in some manner. I found a bleed valve on the left side, when I pressed it, fuel came out. The other thought i'm carrying is a relay or something electronic limiting the fuel control. Gonna check some thinks like that tomorrow.

Just not quite sure where to start beyond that, any tips would be appreciated.

Thanks

Jeff

Share this post


Link to post
Share on other sites

This could also be a "best place for merc service" thread...

Share this post


Link to post
Share on other sites

And I think I found the problem, big connector just in front of the fuel filter is missing the cap that attaches the two halves together. Connected them, voila, started up immediately. Back to the water, electrical tape to the rescue!

Does anybody have one of these engines and is able to maybe take a snap shot of the front right corner with the hood off the engine to confirm what i should be seeing?

Share this post


Link to post
Share on other sites

Hey Jeff, not sure of your issue, but service is great from Dennis over at Nelson Marine, right on 61 south of White Bear Lake. He really knows his Mercs, and especially EFI's.

Good luck.

Share this post


Link to post
Share on other sites

Can you get me the model number (and a serial number would be even better) and I'll get you a snapshot?

marine_man

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0



  • Posts

    •   Anything you post on here from now on has no merit or credibility as far as I'm  concerned.  I wasn't even going to respond to this, but feel what you posted needed to be. If you wish to call my mother a dam, you will, the same as you called another persons mother that. I don't give a rats butt what your political views are, however when you start getting into personal attacks you had better look in a mirror. You don't probably don't know anyone on here personally, yet you attack someone on a personal bases, call there mother a dam and ridicule them because they had a lower portion of a leg amputated due to something they can control, but had no control whether they have the illness and sometime that illness makes you pay a price. BD2 has that illness he can control to a certain extent where he can lead a normal life, however there will be complications and from what I know of him he will accept that. I don't know DB2 personally, I've never met him, I've debated against some thing on this where he and I have had different views, I respect his opinions even though I disagree on many, BUT I SURE AS H--- DON"T ATTACK HIS ANCESTORY OR  ANY TYPE OF DISABILLITY
    • Yea yea all ya auld pharts would  pass out the minute she popped the first button!!
    • Would he get a free hoodie for his efforts?
    • Great to see this in Minnesota. Trout has been on my bucket list and will happen this year. The mix of largies and smalls really works for this show and plays into the guys heads. I was pulling for Hack. He's become one of my favorites. I think these guys are gaining a new appreciation for MN.  Except maybe the Lane Bros.
    • On Monday, March 13, 2017 at 6:14 PM, JigSawJimmy said: You are a miserable 1 footed SOB.   I think it's a pretty low blow when you attack someone's person like that and would have never been left up on this site a while back. I guess we can say we've progressed on this site now?  
    •   Wanderer, you better scaddle on out of these parts before your soul gets taken and your brain gets fried too!
    •   Yeah, you better stick with Bob's girl above old timer. She wouldn't swallow what your selling either!
    • Hack Herren Lee Williamson Jones
    • Funny thread is funny.
    •   I think y'alls secret is safe in here. 
  • Our Sponsors