New Boat
Gday Guys,
New to the site, so firstly a hello to everyone.
Have been reading a few topics and you all seem very helpful.
A mate and myself have recently bought a 4.2 savage dinghy with a 25hp 2 stroke on the back.
Being only 21 and this being our first boat we are needing a bit of help.
We took it for our first spin on the swan today and it was reaching full speed without any dramas.
Fuel was getting low so we added some more fuel to the tank and within 5 minutes, the boat would not get back up to full speed. The throttle was on full but it was lagging and didnt have any power behind it, half throttle was fine. The motor is a 2010.
Any suggestions on what could have happened and any other tips to keeping the motor in good working order would be much appreciated.
Regards
James
naylor_1
Posts: 161
Date Joined: 15/02/10
Did u mix 2st oil with your
Hey mate welcome to the site. Did u mix 2st oil with your fuel? Maybe a stupid question but being your first boat might be the case.
james14
Posts: 87
Date Joined: 02/09/11
Thanks mate, Yeh we did, put
Thanks mate, Yeh we did, put 100-1 which we read of the net. Could be wrong.
Were so pumped to be out on the water, and were pretty devo when it wouldnt get back up to speed
fords_rule85
Posts: 116
Date Joined: 05/03/09
Welcome mate
Welcome to the site mate, any info u need to know will most likely hav been covered here before so use the search function to ur advantage. For the problem with your outboard, sounds fuel like. Did you close the tank breather when filling back up and forget to open it again?? Just a stab in the dark but not impossible. Good luck
james14
Posts: 87
Date Joined: 02/09/11
Cheers for the info. we did
Cheers for the info. we did have the tank breather open so it wasnt that. Hoping it is just fuel issues!
greasemonkey
Posts: 112
Date Joined: 08/05/09
stale fuel
How old is the fuel . Does it smell funny .If so it might be stale
james14
Posts: 87
Date Joined: 02/09/11
Fuel that was already in the
Fuel that was already in the tank would have been max 2 months?? and the added fuel was new.
Regards
James
Reefmonkey
Posts: 711
Date Joined: 22/09/08
Sounds like fuel
If it was idling fine it sounds like fuel, if it was idling rough and blowing smoke could've done a spark plug however assuming its a 2 cylinder it wouldn't idle at all
sounds like air getting into your fuel line, check all off your connections are sealed. Had similar happen to me, in my case the seal on the tank connection had shat it and was drawning in air so the pump can't provide enough pressure to pump enough fuel in at high revs. motor ran fine at half throttle and easily fixed on the water. came undone due to a $3.50 hose connection!
Hint also carry spares of everying on your fuel line out with ya. 90% of the time if your motor gets the niggles out there it will be something simple to do with bad fuel flow. 2 strokes are tough motors and it would had to have had a hell of alot of neglect to have trouble a year on. You've probably got the sick feeling in your stomach when you doubt your recently purchased motor but dont stress just start with the simple things and work your way up.
Dave J.
Swan River Fisher
Posts: 877
Date Joined: 03/05/11
Hey budCongratz on the new
Hey bud
Congratz on the new boat. Is the 2 stroke a Mercury? I've been having similar problems with my 30hp 2 stroke Merc thats 2006. I use it on 50 to 1. When it was new we ran it in on 25 to run. Maybe experiment a bit with 50 to one.
Tomcat
Posts: 614
Date Joined: 24/02/11
Oil
Just check most 2 St run on 50 to 1 ring manufacture and check
james14
Posts: 87
Date Joined: 02/09/11
Thanks for the replys
Thanks for the replys guys,
It is a Yamaha,
will have to look at all those connections and deffinetly check up on the ratio. Get it working properly and its time to catch some fish!
cheers
madfishoholic
Posts: 187
Date Joined: 25/03/10
Welcome to the site, I am not
Welcome to the site,
I am not a mechanic but I have a 70 jono and had purchased new hose and fittings and all seemed great but after a year I had the same sort of problem. It would idle and travel at mid throttle but would not go to warp factor 6.
As it turns out the hose was as hard as a 10 year old kipper on viagra and the the fitting to the motor end was sucking in air and occassionally fell off when I turned the wheel. I went to water world and they were a great help, fixed me up with better quality hose and fittings and a better price than I had been quoted else where.
Hey presto she runs like a dream now warp factor 6 and a bit.
I never thought that would cause so much hassel.
Check for air sucking in from the tank to motor.
Good luck
I dont need counselling just a bigger boat
Reefmonkey
Posts: 711
Date Joined: 22/09/08
Yamaha
Yamaha standard 2 strokes run on 100 to 1, but the CV(red sticker ones) models run on 50 to 1
Dave J.
Swan River Fisher
Posts: 877
Date Joined: 03/05/11
Most 2 strokes are 50 to 1
Most 2 strokes are 50 to 1
Adam Gallash
Posts: 15661
Date Joined: 29/11/05
Mine
My yamaha 30hp 2 stroke - prob 2002-2004 (without looking at the year model) is 100:1. Good luck with it.
Site Admin - Just ask if you need assistance
Tomcat
Posts: 614
Date Joined: 24/02/11
Oil
Just sold 2005 Yamaha 40hp that was 50 to1
Cjsurf
Posts: 134
Date Joined: 23/08/11
The motor
It's not the red sticker one so it's 100:1 , the previous owner ran 50:1 could that have had an effect on spark plugs carb etc..?
( went halves in the boat to get started)
Cheers
Swan River Fisher
Posts: 877
Date Joined: 03/05/11
Well i would run it on 50 to
Well i would run it on 50 to 1 because if thats what the previous owner used, then you should IMO. Maybe ask him (or her) how the motor went on 50 to 1
aaasnapper
Posts: 218
Date Joined: 15/01/10
James, the problem could
James, the problem could really be anything.
The basics you need to check are:-
1. Compression (both cylinders readings need to be fairly close to each other)
2. Spark (you need a spark tester to do this properly)
3. Fuel.
Now you need to ensure the boat runs on 100:1, if not run it on 50:1 until you are certain. If it is 50:1 and were running at 100:1 you may have caused damage- compression test will confirm this.
Try and get a manual for the motor- Ebay. if you want to do your own servicing, otherwise take it to get serviced.
null
james14
Posts: 87
Date Joined: 02/09/11
cheers for the replies
cheers for the replies guys,
will try and get the manual for it and probaly get it in for a service.
Does anyone know of any services places for a 2010 yamaha?
regards james
bp0685
Posts: 8
Date Joined: 30/07/11
Agreed, my 2 stroke runs 50:1
Agreed, my 2 stroke runs 50:1
Reefmonkey
Posts: 711
Date Joined: 22/09/08
Respectfully disagree guys:)
If its a 100 to 1 motor, i personally wouldn't run it at 50:1 without talking to an authorised yamaha dealer and get their advice. At 50:1 you probably wont do and damage to your motor but you'll go through spark plugs every couple of hours of running time. The newer yamahas that run 100 to 1 dont have plugs that will stand the difference in heat for a richer oil mix, if the previous owner ran it at 50 to 1 you could well have done a spark plug but i wouldn't think your motor would still run on one cylinder.
I've got a 30hp 2010 model yamaha(non CV) and running in the motor at 25:1 gummed the first plug after its first hour, after talking to a dealer switched to 50:1 and gummed another 2 in the next 10 hours of run in. Yamaha at the time released a notice for the running of there 2 strokes not to be run in at 25:1 as they were regularly cooking plugs, The dealer i bought the motor off failed to tell me this. Luckily i found this out through my local yamaha dealer next to my work wen i went to get some advice as i new it was the plugs that were the fault.
The motors are meant to be run and designed to run at 100:1, and honestly i run mine at 80:1 as of course more oil is better than less oil.
Not to offend anyone else or even myself though, your motor should still have two years of warranty on it. go get the free advice from a authorised dealer and get there opinion on an oil mix for the motor if your wanting to run it richer, if you had a waranty issue you'd much rather be quoting the advice of a dealers mechanic than that of some dudes on a public internet forum.
I'd first check your fuel lines, if thats not the issue then check your plugs are firing (easy to do, if you get to this it can be easily posted here how to do it) then if your still having trouble then think about paying for a service cos it'll be around $3-400.
What area are you in?
Dave J.
Reefmonkey
Posts: 711
Date Joined: 22/09/08
But...
But of course, Yea determine it is the non CV and runs at 100:1 first
Dave J.
james14
Posts: 87
Date Joined: 02/09/11
Gdays guys, cheers for
Gdays guys,
cheers for everyone that gave me some help.
I rang a yamaha dealer today, and he said for the motor I have 50:1 is the recommened ratio. He added, at that ratio i am likely to go through a few more spark plugs than usual. and if i want I can run It a bit 'leaner'
thanks
James
Tomcat
Posts: 614
Date Joined: 24/02/11
Great
At least you came back with a result so many people ask advice but never bother to post a result hope it all goes well
Cjsurf
Posts: 134
Date Joined: 23/08/11
Cheers guys, we scrubbed up
Cheers guys, we scrubbed up spark plugs, cleaned fuel filter and got rid of the old fuel. Works awesome now at 50:1 fuel.
Cjsurf
Posts: 134
Date Joined: 23/08/11
Cheers guys, we scrubbed up
Cheers guys, we scrubbed up spark plugs, cleaned fuel filter and got rid of the old fuel. Works awesome now at 50:1 fuel.
Swan River Fisher
Posts: 877
Date Joined: 03/05/11
told u so lol
told u so lol
Rod P
Posts: 725
Date Joined: 20/05/08
The Yamaha's are designed to
The Yamaha's are designed to run on 100:1 mix. After 40 hp non oil injection you run them at 50:1
You can run them on 50:1 but you'll just have more smoke and oily plugs. They also say you should only run them on 100:1 with yamalub oil.
If the motor was new you needed to run it on 25:1 for the first two tanks. Then after that first service and change to 100:1
Having said this i only sold Yamaha's for nearly 20 years so i guess i'd have some idea.