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
HeIsLegend

Merc 7.5 Outboard, need help

5 posts in this topic

Problem:

Late 90's 7.5hp 2cycle merc will not start.

To start off , last spring I had a new carb kit and water pump installed at a shop. Normally when I pump the gas bulb I can feel the gas go into the cyclinder and usualy the excess gas will flow out thru the carb if I over do-it. The bad boy will always fire up great.

Yesterday after I put in a fresh tank of gas, got the boat in the water and tried firing it up like I always do. This time it when I was pumping the bulb it would felt like there was something clogged preventing gasoline to be primed into the engine. Instead of seeing the gas leak out of the carb when i primed it, gas would come out of the end of the fuel hose at the connector and simply would not start. Making me assume something was clogged in the carb?

Heres a few pieces of the puzzle:

* The fuel line I boght this year.

* I removed the carb from the engine head with the fuel line attached. Sprayed the heck out of it with carb-cleaner.

* When I start to prime fuel is expelled thru the carb still un attached from the block.

(so I'm guessing something is plugged in the camber?)

Any suggestions?

Share this post


Link to post
Share on other sites

I would say you purchased a cheap fuel line and the one way valve is stuck.

Go and buy and factory fuel line and I would think it would solve your concern, or another cheap one for now.

Could be wrong, we will see what others say grin

Share this post


Link to post
Share on other sites

You shouldn't be able to prime until gas runs out the front of the carb, thats what the inlet needle, float and seats jobs are, to stop the flow when the gas has reached a certain level in the float bowl. Shack makes a good point as well. Some aftermarket hoses and connectors are not of the same quality as OEM. If you have gas leaking out of a connector, it needs to be replaced.

Share this post


Link to post
Share on other sites

I toke your advice, I bought and installed an oem fuel line from a dealer. I still get the same problem. Any other suggestions?

Share this post


Link to post
Share on other sites

As said, your inlet valve shuts off the gas that enters the carb. Yours wasn't doing that and you were able to continue to pump fuel via primer bulb.

You went on to say "This time it when I was pumping the bulb it would felt like there was something clogged preventing gasoline to be primed into the engine. Instead of seeing the gas leak out of the carb when i primed it, gas would come out of the end of the fuel hose at the connector and simply would not start."

This is good and that is what should happen when the inlet valve shuts off the gas coming into the carb.

Problem is your outboard won't start now. Could be that you need to choke the engine(normal cold for start) because the carb's inlet valve is working like it should.

Or could be that debris was preventing your inlet valve to close and now it moved and is plugging the valve.

Or your flooded.

Try it again with choke. If no go then pull the plugs and see if they are wet or dry. You'll be needing another carb cleaning with kit. That would be new needle and set(inlet valve) and be sure to check the float drop.

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