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
JimBuck

A quick question regarding my Mariner 45hp. issue

16 posts in this topic

For the last 3 weeks. My 87' Mariner has been acting up. When sitting for a while....the engine has a hard time turning over. After cranking for sometimes 15 seconds it will SLOWLY start to putt into gear and turn over. It's fine and operational then and if I start it up again in less than an hour it turns right over. But a few times while running at slow speeds it putt's out like gas flow is stopping. I'm wondering if it is something that has to do with air in my gas or inconsistent gas flow to my motor. Any suggestions on narrowing down the problem?

Share this post


Link to post
Share on other sites

This sounds real close to what my '96 25hp Evinrude is doing. From discussion here, as close as I can tell I will need to rebuild or at least clean the carb this fall.

I went through the normal "get new fuel line and bulb" and new gas and all the normal stuff, and it still is doing it. It is like what happened to my '94 Honda Magna a couple years ago, I think the carb just gummed up - after cleaning it runs like new again.

I would start with a brand new "merc" brand fuel line and bulb. The kind you get at FF or Wally world are far inferior, I know that one from experience... doh.

Good luck, those 45/50 merc/mariner motors are great, we have a '82 that we have not touched other than impellors so far, and plugs.

Share this post


Link to post
Share on other sites

Carbs eh? That doesn't sound too good. The engine has been excellent for me and I've never had a problem until now....I will try out the fuel line and bulb and see if I can narrow it down from there. How did you go about cleaning your carbs a few years back BoxMN? I think I've only used a solution that you add to your gas and that seemed to really perk the engine up.

Cheers,

-Buck

Share this post


Link to post
Share on other sites

Yeah, do the cheap and easy things first, the fuel line and bulb.

For the carb cleaning, either bring it in to mechanic, or you can try yourself. I brought my bike into a mechanic and the job was like $500 - but that is 4 carbs on that bike, and I got a deal for doing it in Feb... nice. I then had to take off my carbs on the magna myself to find a fuel leak (old gasket) and that was a bigger job than any outboard carb, that I can think of, at least till you get to big v-6's or soemthing...

For my 25hp and when I get to the 50hp merc, I will just do it myself. It really isn't that hard, and after doing one I think it will be easier. Just get carb kit from dealer and ask for a bit of advice, and then go to town! smile I am doing my 25hp this winter in the garage.

I think the 45 mariner has two carbs, each supplying two cylinders, but other might know for sure and can also let us know if I am blowing smoke anywhere.... as I am not in any way a mechanic. But over the years I have serviced my own motors more and more, and for the common stuff they are actually pretty straightforward and not too bad to do, as long as you have the space, time and tools.

When I say clean the carbs, I am not talking additives, but actually taking them off, putting in new gaskets, cleaning out the bowls and new jets, etc. Sounds more complicated than it really is, though. But it could get messed up if you don't do it right, but IMHO, don't let that scare you. They are less complicated once you get one apart. Or else a couple hundred bucks will probably get the job done with a real mechanic smile

Good luck.

Share this post


Link to post
Share on other sites

Cheers Box. Thanks for the knowledge. I think I'm going to look into the fuel line and bulb here tomorrow and take things from there. Replacing those wouldn't be a bad idea anyways since my bulb is beginning to crack.

Surface Tension. Yes sir, I am choking on the initial attempt if it's been sitting for more than an hour.

Share this post


Link to post
Share on other sites

Like Bob said check the easy stuff first.

One more question, are you priming up the bulb before cold starts and after an hour of sitting is the buld still firm?

If the answer is yes, with the other info you provided, change the spark plugs.

Share this post


Link to post
Share on other sites

i have the same motor I also had the same problems starting when it was cold and when it sat for awhile. you should go through your carbs you might have a sticking needle take the cover off and see if you have any gas leaking the bottom of your carbs should be dry. For your plugs they have ones that do not have to be gapped there is no tip on the right ones . carbs are very easy to do just take your time . Your motor might be flooded that is why it is hard starting.It might just be leaking alittle so you woundn't notice it when it is running

Share this post


Link to post
Share on other sites

Surface, the bulb has been losing firmness after about an hour of sitting. I'll check out the spark plugs as they could be changed anyways.

Raymond, good to hear someone else has similar issues. You mentioned a "sticking needle" can you elaborate? I have noticed traces of gas in the water on occasion. You also suggested plugs that don't have to be gapped? Can you explain? Outside of routine maintenance I don't know much about it.

Thanks again guys!

Share this post


Link to post
Share on other sites

The plugs simply don't have the little "curl" piece of metal. They just don't look the same for this motor as your normal car or other plug, so no need to worry about gapping them.

The needle is just one component of the carburator. Most likely, if it is a carb issue, is that you either have some debris in there, or more likely with this age motor you have some build up of "crud" or varnish that either clogs a jet or prevents the needle from doing its job.

The other guys know real terms and how to do it, but in a nutshell it just needs a simple cleaning by hand smile Nothing some small tools and carb cleaner and a toothbrush can't fix!

Share this post


Link to post
Share on other sites

Excellent. Again, many thanks for the responses BoxMN.

Cheers,

-C

Share this post


Link to post
Share on other sites

Just dug around and exposed the engine after work today....I did notice some moisture or gas buildup near the front part of the engine. Is this a sign of my carb leaking?

DSC_0499-1-2.jpg

Share this post


Link to post
Share on other sites

It could be, it could also be from priming your motor with the motor tipped up, and gas running out the front of your carbs.

Go over the fuel line all the way to where it connects to the fuel pump, see if there are any cracks, evidence of leak (dust / dirt buildup) and go from there.

If it loses prime after an hour it sounds like a leak in the hose or a carb job needed.

marine_man

Share this post


Link to post
Share on other sites

That fuel filter looks a bit aged as well. I would certainly think that a clogged fuel filter or weak fuel pump would cause those symptoms as well.

Share this post


Link to post
Share on other sites

Thanks again guys. Just to give an update. I went over the hose this weekend trying to find a leak without any luck. I did notice that when I prime the bulb it barely takes in any fuel? With this problem recently uncovered, it leads me to believe that theres a leak that occurs between my primer bulb and fuel tank? I'm going to head to the shop to see if I can find a new attachment for the gas hose and a new fuel filter.

Share this post


Link to post
Share on other sites

I would replace the fuel hose assembly - from tank to motor to remedy all issues there.

marine_man

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

    • Way to go team!! I sure took the avg score down with my jake
    • nice story, fishing has a way of easing the pains we have. even when we hurt like crazy when done for the day we are looking forward to the next outing.
    • way to go, guys yep, the toms not about to give up even though its close to closing time have seen several strutters the past couple weeks and heard gobbles yesterday while fishing
    • great job. makes it 5 for 5 for team 5 congrats on a nice tom, 57 and that willl give our team score a boost
    • One More Cast      Photo by:  Roger Abraham   If any of you out there are regular readers of my tales, you have followed my recent struggles with back and knees.  I can’t put a name to this drive I have to be on the stream as of late.  It borders on obsession. I guess in my mind if I am healthy enough to fish the world is right with me and I am not getting old and feeble.      Today I was a witness to that I am not the only one.  Lots of anglers and hunters live to go out into the outdoors. .  It is what drives them.  It makes them feel alive.  It is their passion.  I told my fishing buddy Abe today my thoughts.  I told him how I was feeling a little old.  I guess my 60th birthday coming up next month makes me feel mortal.  Abe laughed and said I was a young buck compared to him.  Abe turns 76 this year.     Abe told me tales about catching big trout in tiny streams in Wisconsin and out west.  The twinkle in his eye when he reminisced I had seen before in many trout anglers.      We fished a stretch for 2 hours.  I sat down and rested often.  Abe kept on fishing. He got hung up in a box elder branch and lost a lure.  Abe told me box elders trees were his nemesis when he fished.   He asked me which tree was my kryptonite.  I told him, "ones with branches."  We both had a chuckle and continued fishing.   I thought to myself this guy is really driven.  I hope I am like him at 76.     We got to the vehicle and Abe wanted to continue fishing.  Abe’s waders sprang a leak earlier and he fell in the water a couple times.  He was quite wet.  He wanted to change in to dry clothes before we continue.  Abe peeled off his wet shirt and there were two things stuck to his chest.  He could tell by my questioning look he needed to tell me what was up.     Abe told me he had been having heart problems lately and he was supposed to be wearing a heart monitor.  He left it in the car because he was afraid of getting the electronics wet.  Here I have been whining about being old and the guy I was fishing with left his heart monitor in his vehicle.      Abe reassured me that he was in no danger and he could continue fishing.  I started brainstorming on a place to fish where it was not so hard walking.  Now that I knew he was not as healthy as he looked I wanted an easy place to fish.  I knew the place and it was upstream 5 miles.     We arrived at the well manicured field.  It looked like a golf green.  I picked the area because the farmer kept sheep and goats on the land and the weeds and brush were gone because of the goats.  We walked and fished.     Abe told tales of the old days and of fish lost and landed.  I walked a little forward to fish and looked back to check up on Abe.  What I saw when I looked back scared me and I immediately asked Abe if he was ok.  Abe was laying flat on the ground face down.  I thought the worst and he could tell by my face.  He told me to calm down.  His back was acting up and he needed to straight it out and that was the best way to do it.   We fished a little bit more and he took a photo of me.  He liked the lighting. He told me it captured the essence of trout fishing.  He did not have a camera.  I let him use mine.  He was not camera savvy and needed an impromptu lesson on how to use it.   We drove to his car and we talked about our love of the outdoors. We shook hands and headed our separate ways and promised to fish again soon.  As I drove home I smiled and thought about how I am going to be when I am 76.  I hope I am like Abe and my eyes still twinkle when I talk of chasing trout and I am still driven to make one more cast.
    • The past week has had me having multiple close calls and missing a brute at 45 yards.  Tonight I talked my dad to give it another try and there were birds in the field when we got there.  Birds ended up leaving as we tried to sneak in.  A short 20 minutes later they were back and we watched and worked the big group of toms and hens for more than 2 hours before we got one to commit.  Dad shot him with his 20 gauge at 48 yards,(this thing shoots an awesome pattern).  The 3 year old was down and only flopped a few times.   Nice 1+ inch spurs, 10" beard and heavy.  A good evening for sure!
    • Sorry to disappoint guys, but this tom was not my first bird of the season. Apparently that's part of the rules. The score won't count towards the team. I don't have any measurements for the jake I shot so we will have a zero from me.    At least my freezer is full. 
    • Way to  go 1957 !! Congrats!!
    • sugar is not a drug. 
  • Our Sponsors