Moburchette
Cadet
- Joined
- Jan 18, 2013
- Messages
- 9
Please read below, i am re -posting this problem with an update in the hopes of some fresh help. Here is a lnk to the original thread.
http://forums.iboats.com/yamaha-suzuki-outboards/yamaha-f40-idle-starting-issues-589372.html
Thanks.
Here's a good one for y'all. I just bought a skiff with a 2003 Yamaha F40, my first trip out resulted in a tow back to the dock after a very short run. The problems are described below.
1) The motor stalled out (at idle)after about five minutes of operation and wouldn't restart at idle...just crank, sputter, and smoke little. The only way I could get it to fire up would be to give it more throttle in neutral, but it would stall when I had to throttle down to drop it in gear. A couple times I did manage to get it in gear and throttle up and it ran like a clock.
The boat had approx 1/2 tank of fuel when I bought it of undetermined age (it ran and idled just fine on muffs), before this maiden voyage I topped of the tank with E10 and added the proper amount of ethanol treatment.
Also, while scratching my head looking at my stalled motor with the cowling off I noticed a small amount of fuel puddle in the botttom, but was unable to determine the source.
2) The starting system problem: sometimes (most but not all) when I turn the key to the start position the starter clicks...makes about 1/4 weak turn and stops...still holding the key in start position for up to a full second...then it cranks away nice and strong and the motor fires right up.
The battery is brand new, I've checked the connections at the starter relay and motor, everything looks fine, I have noticed that after a couple cycles the neg battery post on the battery gets pretty warm.
I would like to avoid simply throwing parts at these problems, but rather systematically troubleshoot them...need some help getting started.
Thanks. Matt
...2 months later...
Well I finally got back to working on my little skiff. The idle problem seems to have resolved with a new fuel / water separator element and housing, as well as replacing a leaky fuel line connection at cowling.
The starter problem persists however...I have gone over all connections and they are pristine. Although I did find a place where the main leads had been spliced about mid way between battery and motor, I removed the tape / shrink wrap and cranked the motor and found these splices where getting quite hot. I cleaned them up and re-connected with bright shiny butt connectors. The problem was about 70% gone but not totally. I did notice the copper in these leads was quite black, shined up nicely with sand paper but still pretty black. In the following days the problem is pretty much returned as it was before I repaired the splice.??? Wondering if i'm focusing on the wrong thing.
Thanks.
Matt
http://forums.iboats.com/yamaha-suzuki-outboards/yamaha-f40-idle-starting-issues-589372.html
Thanks.
Here's a good one for y'all. I just bought a skiff with a 2003 Yamaha F40, my first trip out resulted in a tow back to the dock after a very short run. The problems are described below.
1) The motor stalled out (at idle)after about five minutes of operation and wouldn't restart at idle...just crank, sputter, and smoke little. The only way I could get it to fire up would be to give it more throttle in neutral, but it would stall when I had to throttle down to drop it in gear. A couple times I did manage to get it in gear and throttle up and it ran like a clock.
The boat had approx 1/2 tank of fuel when I bought it of undetermined age (it ran and idled just fine on muffs), before this maiden voyage I topped of the tank with E10 and added the proper amount of ethanol treatment.
Also, while scratching my head looking at my stalled motor with the cowling off I noticed a small amount of fuel puddle in the botttom, but was unable to determine the source.
2) The starting system problem: sometimes (most but not all) when I turn the key to the start position the starter clicks...makes about 1/4 weak turn and stops...still holding the key in start position for up to a full second...then it cranks away nice and strong and the motor fires right up.
The battery is brand new, I've checked the connections at the starter relay and motor, everything looks fine, I have noticed that after a couple cycles the neg battery post on the battery gets pretty warm.
I would like to avoid simply throwing parts at these problems, but rather systematically troubleshoot them...need some help getting started.
Thanks. Matt
...2 months later...
Well I finally got back to working on my little skiff. The idle problem seems to have resolved with a new fuel / water separator element and housing, as well as replacing a leaky fuel line connection at cowling.
The starter problem persists however...I have gone over all connections and they are pristine. Although I did find a place where the main leads had been spliced about mid way between battery and motor, I removed the tape / shrink wrap and cranked the motor and found these splices where getting quite hot. I cleaned them up and re-connected with bright shiny butt connectors. The problem was about 70% gone but not totally. I did notice the copper in these leads was quite black, shined up nicely with sand paper but still pretty black. In the following days the problem is pretty much returned as it was before I repaired the splice.??? Wondering if i'm focusing on the wrong thing.
Thanks.
Matt
