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
wall_guy_101

Mid 80's 25hp LS....Won't stay running

20 posts in this topic

Alright,

Last year my motor was getting progressively harder to start. Now it won't start at all. I've put in a new carb kit,jets have spark but my plugs seem excessively wet. Flooding out? Perhaps float adjustment?....need recommendations cause it's driving me nuts. It will spit and sputter but just can't get it to keep on keeping on.

Thanks.

Share this post


Link to post
Share on other sites

fuel filter, carbs rebuild, replace fuel lines, etc, it sounds fuel related

Share this post


Link to post
Share on other sites

Sounds like it is time to replace the plugs. Then, when you get it going, do a hard shot of sea-foam through the carb throat, get it in there until the motor dies, then put a bit more in, let it sit for a spell (20 minutes minimum) then take it out and run it wide open until the whole system is cleared out.

To me, it sounds like plugs are fouling out, and the system just needs a good decarbonizing.

Steve

Share this post


Link to post
Share on other sites

Wow, what happend to the search function on this board? I can't do a specific search... so... I tried to search a thread I had going and all the steps I did. Mine was remarkably similar to yours, and I think it would help you out, if anybody can find it.

BoxMN was posted, and it was about in April of this year. Good luck finding it... maybe my problem finding it is related to my IE8 issues with this board. I jsut wanted to post the link to my thread.

Share this post


Link to post
Share on other sites

Old gas is definitely not the problem....made sure to empty and clean tank and also ran non-oxygenated 91oct. fuel. The plugs were brand new a week ago so i have to eliminate that as an issue. I have to think it may be a stuck needle?? Perhaps it's not seating all the way letting to much fuel in. Will keep you updated and thanks for the responses!!

Share this post


Link to post
Share on other sites

something cheap you can try: Replace the plug wires. Over time, the plug wires will eventually lose their capability to carry a current due to build-up of of resistance in the wire. Shouldn't cost more than a few $$ and is good preventative maintenance. Being a mid 80's motor, it certainly couldn't hurt...

tough thing is that it's like shooting in the dark.

What brand motor?

Share this post


Link to post
Share on other sites

Yep, thanks Black Bay, that is it.

You will see the mistakes I made and the little things to check. All in all, everything was easy on my motor, just make sure to check every detail to make sure you did things right.

Now it is "running like a Mercury" wink

Share this post


Link to post
Share on other sites

Thanks so far for the responses!

I tore apart the carb today (again) with no better results. It looks like i'm getting a very good solid spark. Im beginning to believe it may be an electrical issue such as timing. It is a mercury by the way. The plugs are still wet looking even though I turned the needle way down. Still spits and sputters but can't get it to stay going. Will try the new wires but my mind is telling me it's something different. Still not sure what though. Another thing i'm encountering is after so many pulls today i'm getting really black oil dripping off of the bottom of the motor.......What next?? Perhaps it's the crank seal??....thanks again.

Share this post


Link to post
Share on other sites

Sounds to me that you have the opposite of BoxMN's problem - too much fuel..

Which would point me back to the carburetor if you have good spark. If your float is made of a sponge-like material, sometimes they will get soaked with fuel, and when that happens, they won't float up and shut the fuel supply off like they are supposed to...

Share this post


Link to post
Share on other sites

Afraid thats not it....its the hard plastic bladder style....

Share this post


Link to post
Share on other sites

if you take the float out and shake it does it have fuel in it? Have you checked the oil level to make sure that it is not making oil by pushing gas into the crankcase? We have this on some smaller equipment when it sits with the valve on, it seeps into the crack case then wont start. Just a thought.

Share this post


Link to post
Share on other sites

Still think your getting too much fuel some way - needle valve not closing all the way or float not adjusted right, or something on that order.

Does the motor have good compression?

Share this post


Link to post
Share on other sites

Not familiar with that motor but if it has a fuel pump maybe the diaphragm is shot. Is there a primer bulb? If so does it stay hard.

Share this post


Link to post
Share on other sites

did you check the compression with a tester you need at least 85 psi or its not going to want to stay running.

Share this post


Link to post
Share on other sites

Euro has a great suggestion in the fuel pump. If the diaphram is shot, it will pump gas directly into the crankcase.

Share this post


Link to post
Share on other sites

Again, thanks for the replys.

The bulb is staying hard so i'm not tending towards that idea. I'm now thinking towards the crankshaft seal itself. Will check compression tomorrow. Thanks again

Share this post


Link to post
Share on other sites

Hey gents,

After almost a total tear down of the motor i seem to have found the problem(s). #1 Found a slight tear in the vacumm line thatruns from the top of the head around to the intake port. #2 My fuel line bracket was tweaked not allowing it to stay forward enough to start while in the neutral position. Seems to run like a honda now. Thanks again for the responses.

Share this post


Link to post
Share on other sites

Hey gents,

Seems to run like a honda now. Thanks again for the responses.

You mean it is now running like a Merc wink hehe, my "real" boats have Mercs...

Glad you found it! Have fun smile

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

    • Misguided by love as pure as the driven snow.  
    •   Yep, am with ya......and most of us thank you. Should not be a difficult concept to understand.....except for a select Jv few.
    • So was I.  When I say "my equipment" won't be freezing up when I am hole hopping with the aid of my toasty warm Otter cottage, part of my equipment that won't be freezing up would be the ez ducer...   
    • Reinhardt was sincere, and I don't believe he was trying to sell anything,  He had a lot of knowledge about meat, and simply wanted to share it.   I didn't fault him for his politics, either.  He was simply misguided on that....        
    • I took Mickey in 2008. Bubbles 4 years later. Not too worried about winning as some on here .....as winning in  those years wasn't really winning, and so far, neither is picking the winner in 16, other than saying you picked the winner and "get it".
    • Had an opportunity to tag along with LeeKen to Bluestem Nature Conservancy and sit in a blind Saturday morning.  Thought it was unusual to see a deer with antlers late March.
    •     I was thinking more like Goofy=Pres. Trump
    • Murphy’s Law   I went out this afternoon trout fishing.  I questioned the wisdom of fishing on a robin’s egg blue sky day.  Trout shun sunlight.  I went outside to check the weather. The warmth of the afternoon coaxed me out of the house.     I fished a stretch I have done well on in the past.  I knew because of the bright sun I would more than likely not do well on big trout this outing.  Trout do not have eye lids and shun bright sun. When I got to the stream the outdoor temperature was 58 degrees.  I took the water temperature and it was almost 50 degrees.  That is well within a good temperature range to score some trout.     I hit the water at 2:45pm.  The sun was high in the sky and not a single cloud was in the sky.  I knew from experience that days like these I typically fished the shaded side of the stream.  There was no shaded side of the stream.      The fishing was tough.  I had lots of follows and flashes at my lure.  None seemed to want to commit.   I decided to look for cover for the trout.  I decided anything to throw a little shade on the trout would make them feel comfortable.     The trout had lock jaw.  I decided to target broken water so the trout would feel secure and come out in the bright light.  They still were bashful.  I decided another trick was in order. I was going to throw in the biggest snarly messes and let the lure drop to the bottom and give it a tweak to start the blade going.  Bang bang and I was in business.  This only worked in deep runs and i lost a few lures throwing into the mess.     I ended the outing with 24 brown trout to hand. The biggest was about 16 inches.  It was 5:30pm.  I usually get out at a bridge and today was nothing different.  I stood on the bridge looking upstream.  There was a sweet log jam just upstream of the bridge and it was in shadows.     I decided i was going to go just upstream in the shadows and cast a few more times. I was still on the bridge looking upstream. I looked at my reel and there was a loop on the spool.  This loop needed to be cast out if I was going to continue fishing.  I decided the bridge afforded the best angle and no trees in the way to cast out the loop in my spool.     I cast off the bridge.  The loop caught and dropped my cast about 15 yards upstream.  It nearly didn't land in the water.  It hit tight to the bank and I had a big snarl in my reel.  I looked down and saw my panther martin was barely in the water.  I decided to pull off some line and get this snarl out.  I made even a bigger mess.     I sat down on the bridge rail and started to mess with my giant snarl.  I again looked at my lure and it was barely in the water.  I was worried about losing the lure because of the snarl.  It was safe and barely dangling in the water.     I  really made a mess with the reel.  I was cussing it and trying to untangle it.  I lost focus on my lure in the water. I was peering over my glasses and really putting all my attention on this mess and I heard a splash sound.  I looked upstream and saw nothing.  I looked back at the reel.  I heard a louder splash and looked over the bridge at my lure suspended in the water.     My mouth dropped open wide and I stared in disbelief.  Me messing with the line caused the lure to jig up and down in the water.  This attracted a predator.  Not 2 inches from my lure was a giant trout suspended and staring at the size 9 gold panther martin deluxe waiting for it to move again.     My reel was still messed up so there was no battling this huge female trout on my reel if it decided to quit dancing with my panther martin and eat it. The bridge was at least 15 feet off the water and the idea of battling a monster trout from above was not appealing.  I worked frantically on the snarl.  It got even more messed up.     My fighting with this reel and keeping one eye on the giant female was nerve racking.  She still was very interested in my lure.  She circled it like a shark.  It was more than I could stand.  I decided if I hooked up with her with this less than optimal circumstances I would lose her and maybe kill her because of the bridge nonsense.     I decided to try to catch her another day.  The reel was non functional and i grabbed the line and lifted the lure out of the water.  What happened next is going to be relived in my dreams for the rest of my life.  The monstrous female brown bum rushed the lure as I lifted it out of the water.  It launched itself out of the water snapping at the spinner.  It was a swing and a miss. I got my wits back together and thought about cutting out the snarl and trying for her. I decided a return trip was on the agenda.  As I write this recollection I smile and cuss my circumstances.
  • Our Sponsors