- My Forums
- Tiger Rant
- LSU Recruiting
- SEC Rant
- Saints Talk
- Pelicans Talk
- More Sports Board
- Fantasy Sports
- Golf Board
- Soccer Board
- O-T Lounge
- Tech Board
- Home/Garden Board
- Outdoor Board
- Health/Fitness Board
- Movie/TV Board
- Book Board
- Music Board
- Political Talk
- Money Talk
- Fark Board
- Gaming Board
- Travel Board
- Food/Drink Board
- Ticket Exchange
- TD Help Board
Customize My Forums- View All Forums
- Show Left Links
- Topic Sort Options
- Trending Topics
- Recent Topics
- Active Topics
Started By
Message
Outboard issues
Posted on 5/27/25 at 10:55 am
Posted on 5/27/25 at 10:55 am
I think I got it narrowed down, I just want others opinions
Had an outboard sitting up, a 40 Yamaha. Cranks fine. Revs fine. When under a load, it won't go over 1200-1500 rpms and won't get on step. Launched yesterday and ran fine. Got up on step then bogged down after a minute or so and went to an idle... high speed jets?
Also, want pissing when hooked up to a hose. When I got on step it pissed but as soon as I had to idle it stopped. Assuming the impeller.
Thoughts?
Had an outboard sitting up, a 40 Yamaha. Cranks fine. Revs fine. When under a load, it won't go over 1200-1500 rpms and won't get on step. Launched yesterday and ran fine. Got up on step then bogged down after a minute or so and went to an idle... high speed jets?
Also, want pissing when hooked up to a hose. When I got on step it pissed but as soon as I had to idle it stopped. Assuming the impeller.
Thoughts?
7
Posted on 5/27/25 at 11:04 am to Dtbtiger
Replace impeller and clean carb
Posted on 5/27/25 at 11:05 am to Dtbtiger
Sounds like maybe a fuel issue (maybe air is getting mixed?). It revs fine and seems fine out of water because there is no load which doesn't use as much fuel.
Posted on 5/27/25 at 11:11 am to Dtbtiger
quote:
When under a load, it won't go over 1200-1500 rpms and won't get on step. Launched yesterday and ran fine. Got up on step then bogged down after a minute or so and went to an idle... high speed jets?
Possible, but I would check fuel lines, in line filters, and bulb first.
Then carbs, then high pressure filters.
quote:
Also, want pissing when hooked up to a hose. When I got on step it pissed but as soon as I had to idle it stopped. Assuming the impeller.
yes, likely
Posted on 5/27/25 at 11:52 am to Dtbtiger
High speed jets it sure sounds like. Pull that carb, and soak it. Spray in carb cleaner likely won't get it done.
Posted on 5/27/25 at 12:03 pm to Dtbtiger
Non-ethanol fuel? If not, then I would recommend the following:
Carburetor cleaning spray (CRC), empty tank, fresh fuel (non-ethanol), new fuel filter, replace primer bulb, Sea Foam or Ring Free work well.
Remove the carburetor(s) and clean thoroughly.
Carburetor cleaning spray (CRC), empty tank, fresh fuel (non-ethanol), new fuel filter, replace primer bulb, Sea Foam or Ring Free work well.
Remove the carburetor(s) and clean thoroughly.
Posted on 5/27/25 at 12:20 pm to Tridentds
quote:
High speed jets it sure sounds like. Pull that carb, and soak it. Spray in carb cleaner likely won't get it done.
This is the answer, had a 90 Yamaha that would have this exact issue. Clean the high speed jets and she was good to go.
Posted on 5/27/25 at 1:46 pm to Mushroom1968
This
Posted on 5/27/25 at 2:01 pm to Dtbtiger
Make sure you mark each carb with a zip tye and replace in same hole on block.
Posted on 5/27/25 at 2:17 pm to TexasTiger
quote:
High speed jets it sure sounds like. Pull that carb, and soak it. Spray in carb cleaner likely won't get it done.
This is the answer, had a 90 Yamaha that would have this exact issue. Clean the high speed jets and she was good to go.
Same with a 115. Don't forget to check fuel filter.
Posted on 5/27/25 at 8:41 pm to Dtbtiger
Make sure that you do not have oil in your fuel.
Posted on 5/27/25 at 10:44 pm to bearhc
quote:
Make sure that you do not have oil in your fuel
Its oil injected
I plan on tearing it down this weekend. Revved up fine on the muffs again today, threw up 4500 rpms but then stuck it in a 55 gallon drum and same thing, won't go above 1200
Posted on 5/28/25 at 12:05 pm to Dtbtiger
Another thing to check- fuel lines. If they're old, especially the Grey lines, ethanol will eat them and degrade the inside.
My current motor- previous owner thought it had a bad fuel pump. Fuel lines were degraded so bad I couldn't even blow compressed air through them.
My current motor- previous owner thought it had a bad fuel pump. Fuel lines were degraded so bad I couldn't even blow compressed air through them.
Page 1 of 1
Popular
Back to top
Follow TigerDroppings for LSU Football News