Jump to content
  • GUESTS

    If You  want access  to member only forums on FM, You will need to Sign-in or  Sign-Up now .

    This box will disappear once you are signed in as a member.

  • 0

Marine Man??


gofishingtom

Question

Have a older 4 stroke yamaha starts fine warms up then when i go to put it in forward it chokes and dies..and even if i squeeze the bulb thinking its not getting enough gas..but its getting enough gas and the carb is clean and injectors are clean..Had it in to a older marine mechanic who doesnt work on 4 strokes but it has him miffed as to the problem as he says its getting enough gas but something is stopping it from gas when you put it in forward position..Hope this might be enough information for you and you might have an idea...He says the next thing to try is a carb kit for it..

Link to comment
Share on other sites

23 answers to this question

Recommended Posts

  • 0

Have you tried letting the motor sit in nuetral for a couple of minutes befor heading off. Sometimes thats the ticket.

Link to comment
Share on other sites

  • 0

Stalls out under load...

What year does "older" indicate?

What happens if you advance the throttle slightly before going into gear? Does it still stall?

I'm actually wondering about your lower unit...Resistance?

Link to comment
Share on other sites

  • 0

Sounds like a dead cylinder. Pull the plugs and spark test each. Also check the tips of each plug. A clean tip could mean a blown head gasket or a plug that is not firing.

Link to comment
Share on other sites

  • 0

I do think it is possible fuel pump (lack their of) and I do agree to pull plugs and check. If possible do fuel pressure test. Also replace plugs if you already have not done so. This is what I would do if it was a two stroke.

Link to comment
Share on other sites

  • 0

Have you tried idling it up via the neutral throttle control (either via pushing the button in on the middle of the control lever (if flush mount) or via the lever along side the main control box lever)? If so, does it cut out then?

I'd also check for spark and the spark plugs.

Start there.. and let me know what you find.

marine_man

Link to comment
Share on other sites

  • 0

spark plugs are new and its getting spark..also pressure check and cylinders are all 100%..idles fine and let it warm up and still when it is put in forward position it sputters and stalls..the carb was cleaned and injectors are working and fuel bowl has gas in it..the guy that is working on it is very exp. in 2 strokes and is miffed as to why it doesnt get any gas when you advance it to forward.squeezes the bulb to try to give it gas to keep it running but still bogs and stalls...he was checking into a carb kit for it to see how much it could run for this model..as year not sure what year it is but i figure it is one of the first model possibly yamaha made its white..i would say 1999 model possibly...thanks for help hope this info might help me help him where to check next..

Link to comment
Share on other sites

  • 0

I don't know if this will help but have you checked the air intake? My 25 hp Johnson would idle fine but when I gave it some throttle would bog, cough and sputter. There was a hunk of foam from the inside of the cover that had gotten into the air intake. Something else to check.

Link to comment
Share on other sites

  • 0

Have you tried idling it up via the neutral throttle control (either via pushing the button in on the middle of the control lever (if flush mount) or via the lever along side the main control box lever)? If so, does it cut out then?

marine_man

Link to comment
Share on other sites

  • 0

yes the idling doesnt help once you put it in gear she sputters and bogs once it wants to go..like it is starving for gas..but it is getting gas..could it be fuel pump..or do you think looking into a carb kit is the way to go..

Link to comment
Share on other sites

  • 0

I had a Yamaha 40 that acted like that and it was a choke diaphragm issue.

My .02

Link to comment
Share on other sites

  • 0

If compression and spark is good and fuel is being delivered then I would take the lower unit off remove the water pump and hand turn in forward gear. From the description of what you mechanic has done the lower unit could be trashed and locked up.

Link to comment
Share on other sites

  • 0

lower unit is fine as that has been done..its having a lean miss fire..he has taken the screw off and can see that it is getting gas..he describes it as a lean miss backfire..air intake is not plugged as he can see through it.does not have a choke diaphram on it..So keep the ideas coming if anybody has any other ideas...

Link to comment
Share on other sites

  • 0

I do not know all the in and outs, but it sounds like manual fuel pressue test of fuel pump to see if with specs. You should be able to do an in line test while running with rabbit ears on and see if it drops out of spec.. this would at least rule out pump if it is not it. Possibley elec. (possibley a micro switch if they have one) they cut spark at this time. Possibley bring in for second opion.

Link to comment
Share on other sites

  • 0

Quote:

Have a older 4 stroke yamaha starts fine warms up then when i go to put it in forward it chokes and dies..and even if i squeeze the bulb thinking its not getting enough gas..but its getting enough gas and the carb is clean and injectors are clean.

Is it possible to have both injectors and a carb? Is this engine carburated or fuel injected?

Link to comment
Share on other sites

  • 0

Quote:

yes the idling doesnt help


I'm sorry, but I still don't understand what you're saying here. If it's in neutral and you use the high speed idle feature (revving up the engine in neutral) does it exhibit the same symptoms?

marine_man

Link to comment
Share on other sites

  • 0

Quote:

Is it possible to have both injectors and a carb? Is this engine carburated or fuel injected?


I'm pretty sure if this is a 1999 model it's got carburetors.

marine_man

Link to comment
Share on other sites

  • 0
  • 'we have more fun' FishingMN Creators

I've seen the same question asked 3 times now but no reply to it. Dose it stall out while in neutral with fast idle?

Link to comment
Share on other sites

  • 0

Is this a tiller or console mode??? Northlander is having a similar problem but it stalls when going into neutral ,,,could it be a neutral switch adjustment/malfunction???

Randoid

Link to comment
Share on other sites

  • 0

yes it stalls and sputters when you use the fast idle..it is carb no injectors...the guy looking at it says its a lean miss fire.. you can idle it just fine and high idle it but the minute you put it in forward it sputters and stalls..he is checking with some other mechanices and see if it might need a carb kit..will let you guys know what happens..

Link to comment
Share on other sites

  • 0

A lean miss fire should not cut out eng., or maybe computer see this and shuts down. I do not know, I have not had a lean or miss fire issue before, that stalls. Possible fuel pump still or leaking intake gasket or carp gasket to intake gasket. It cuts out, how many variables could their be? If you shift it back in Neu. does it stay running?

Link to comment
Share on other sites

  • 0

Thank you for answering my question.

Based on your information now I'd say it's a carb or fuel pump problem. You either have some junk in the carbs, or, your carbs might not be in synch any more, especially if you or the mechanic adjusted one and not the rest, etc.

In regard to the fuel pump - you should be able to verify if the pressure is in spec or not.

Presuming you haven't put a carb kit in it lately it might not be a bad idea, but when it's done you must pay attention to how many turns the jets are in when you remove them to clean them and install them the same number of turns.

If you're still exhibiting the same symptoms it's probably time for a trip to the dealer. Synching 2 carbs by ear isn't too hard, but 4 is another story.

marine_man

Link to comment
Share on other sites

Guest
This topic is now closed to further replies.


  • Your Responses - Share & Have Fun :)

    • leech~~
      He wanted his fish Back!  
    • Hookmaster
      I noticed something in the pictures of the fish in my previous post that show up on my phone but not here. The little icon in the lower right. When I touch it, up pops the email of the author of the newspaper article that the phone detected. Maybe the phone is too smart!!😜
    • LakeofthewoodsMN
      On the south end... Fish houses can be left overnight on Lake of the Woods through March 31st.  This year, ice is holding nicely.  A few ice roads are still open, some have closed for the season.  There is still some good ice fishing to be had if you have the bug, but contact the resort or outfitter operating the ice road prior to travel. The walleye and sauger season extends through April 14 and the pike season never closes.  Perch, eelpout, tullibees and crappies are also in season. Varied reports this week for walleyes.  It seems the fish are on the move.  For those who moved around and got on fish, they caught.  Some good reports off of Pine Island in shallower water, 14 - 20 feet.  Also good reports from the Rocky Point, Long Point, Zippel Bay and Morris Point areas.   Huge pike continue to be active with good reports this week.  Setting up in 5 - 15 feet of water is the depth most anglers are targeting.  Using a quick strike rig with a live sucker, dead smelt, tullibee, herring or fatty hot dog have been catching some big pike. On the Rainy River...   Open water fishing on the river has begun.  The Nelson Park boat ramp in Birchdale is open to all boats.  The next access downstream is Frontier and as of Tuesday morning (3-28-23), the open water was almost there.   A big thanks to Koochiching County for doing a nice job of clearing the accesses of snow and ice at the boat ramp.  It extends the short window of spring fishing on the river and makes dropping a boat into the river safer. Mainly three techniques being used to catch walleyes on the river.  Jigging with a plastic, jigging with a minnow and trolling crankbaits slowly upstream. Bright colored jigs and larger plastics with twister tail or paddle tail.  Best colors chartreuse, orange, pink and white. Halfway across the river is Ontario.  Boaters can navigate into Ontario waters for safety reasons, such as avoiding hazardous structure, a pack of boats, etc.   If you plan to fish Ontario waters, many different rules apply.  Must have an Ontario fishing license, no live, dead or frozen bait, no alcohol, etc.  Anglers can boat into Ontario waters without checking into Canada Border Services Agency if they don't touch land, a dock, another boat, or exchange goods or services.  No walleyes or saugers from the Ontario side of the river are allowed to be transported across U.S. waters as it is a catch and release season only in the U.S. side.  This is for informational purposes only, please check official regs. Four Mile Bay and the Rainy River, catch and release only for walleyes and saugers through April 14th.  The big lake is still open for harvesting walleyes and saugers through April 14th.  Please take good care of the walleyes.  Have a camera, needle nose, etc ready to go.  Be quick on taking pics.  Handle walleyes with care and release quickly. Up at the NW Angle... Ice fishing is winding down up at the Angle.  The fish are biting and those who are still getting out are being rewarded.  With fish houses having to be off the lake by March 31st, some locals and those with their own equipment are taking advantage of the late season ice. This is the time of year fish houses get put away for the year, bombardiers and other winter equipment gets summerized and stored.  Most operating resorts take a well deserved break and start gearing up for the MN Fishing Opener May 13th. For those looking to access the NW Angle while avoiding customs, the Lake of the Woods Passenger (charter boat) Service transports you to your favorite Angle resort and keeps you in Minnesota.    
    • Rick
      A weekly list of news briefs about fish, wildlife, and habitat management.Discuss below - to view set the hook here.
    • Rick
      The statutory end of the snowmobile riding season on grant-in-aid trails is midnight, March 31, when permits with private landowners expire.Discuss below - to view set the hook here.
    • Rick
      The Minnesota Department of Natural Resources invites anglers and others to comment through Friday, April 21, on fish management plans for several lakes in northern St. Louis County that are located in the International Falls fisheries work area.Discuss below - to view set the hook here.
    • Hookmaster
      Fished a southwest metro lake on Saturday and still drove out. One truck was already out when I got there. Only caught a couple small bluegill as I chased the schools around. They just wouldn't stay still. Went back to where I caught them on the 15th and there were plenty of gills and crappie. Gills were 7.5-8" with one 9" and the crappies were 9-10" with one 11 3/4". Tried a new reel, 13 Fishing Descent (thanks Royce) on the Tickle Stick and once I got the free spool tension setting adjusted, I liked it. Glad I brought the ice cleats. Should have brought a sun buff, my face got a little red. Waved a younger guy on a snowmobile over since he was looking more than fishing. Turns out we met about 8-9 years ago duck hunting but hadn't seen each other since. Met his dad and talked to him about 45 minutes since we had some stuff in common. All it took was me willing to share my spot that made the last part of my outing more enjoyable.
    • Bloatlord
      Random question as I don't know the area well: is Burntside pretty difficult to pattern for you? I've consistently heard it produces, but can be tricky as hell to figure out.
    • leech~~
      Welcome Robb. Any other safety tips you have please keep sharing them!  👍
    • Safety Robb
      After some research the reason is the plasticizers in the rubber hose the high pressure squeezes them from the rubber into your appliance. The reason a bbq is not affected is it has a regulator at tank end of the hose turning the pressure into “low pressure” no longer squeezing oils from the rubber hose. You may be saying well why don’t I put a regulator at the tank, well I thought the same thing initially but if the device already has an internal regulator you may run into problems. On Mr heaters website they have a hose that is made from a different material that says does not require filter it part number F273704 I’m not sure if other companies make a hose with same specs.
×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use and Privacy Policy. We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.