Yamaha 30HP

[quintrex101]

hello,

i am jut wonder for a few tips for a 30hp yamaha, i wonder would it be better to tilt the motor up wen it is in the shed or leave it down, and would it be better wen flushing the motor to let the fuel line out and let the cabby run out of fuel or just turn it off,

cheers,
:hellyeah:

[xtosea]

Have the motor down while it is stored, but that is normally applied to engines that are stored outside so that if it rains no water gets in th shaft and gearbox. It prolly wont matter that much if its in the shed, but to be safe leave it tilted down.

Maybe someone else can help you with the flushing bit, dont really know the answer, some people do it and others say dont let your motor run dry? This one is for someone else to answer.

Kamil

[quintrex101]

Have the motor down while it is stored, but that is normally applied to engines that are stored outside so that if it rains no water gets in th shaft and gearbox. It prolly wont matter that much if its in the shed, but to be safe leave it tilted down.

Maybe someone else can help you with the flushing bit, dont really know the answer, some people do it and others say dont let your motor run dry? This one is for someone else to answer.

Kamil

i got it outside, i did't mean to put it down in the shed, sorry kamil, thanks for the info, it helps alot and witht the motor flushing i leave it run dry now, ia that ok, if anyone can asnwer that i would be happy :smiile:

[xtosea]

No worries Daniel, if its outside i've beentold to have it trimmed all te way down.
Can anyone else help Quinnie?

Kamil

[storms72]

Quinnie maybe times have changed in the last few years but when I was in the industry we always recommended to run the motor dry to flush as the 2 stroke mix can clog-up carbies as over time it does gum-up.
I am guessing your engine is a late 90's model and if so I would definately say to run it dry!

For 4 stroke engines we used to just recommend to run for a couple of minutes to flush out the salt water.

On the don't run it dry Kamil, on injected engines be it 2 or 4 stroke I also would say don't run it dry (same reasons a with a injected car-can clog injectors) I would be interested to find out if anyone would say this bout a carbi fed 2 stroke and the reasoning behind it-how can it hurt the motor? No fuel = no go = no harm!

[quintrex101]

thanks jason, it is a 2001 model motor and from what i rememeber it got about 150 hours on the clock

[storms72]

Quinnie, I expect its a twin carb twin cylinder..... unless someone can come up with a good enough reason not to run it dry....run it dry mate!

[beats]

Leave it down when stored & when you flush, dont run it dry, when you run it dry you are running it out of fuel obviously but also out of oil at the same time, this can damage rings or at worst burn a piston. just clear its lungs with a few short sharp revs to burn oil off plugs from prolonged ideling ( don't ring its neck ) & shut her down & put it away.
Oh: and dont use servo crap oils, use manufacturers oils, I know whith my Merc if i run it on rubbish oil it plays up big time & coughs & cuts out when i stop, if I use the quicksilver premium outboard oil thats recomended for it, it runs perfectly.
Jason is that a good enough reason for ya?:lol:

[quintrex101]

thanks beats, by the way storms wrong again it is a 3 cylinder

[fishinf]

thanks beats, by the way storms wrong again it is a 3 cylinder

thats the funnyest post all night i just bust out laughing :rolling laughter: :rolling laughter:

[xtosea]

I must say Daniel is the cheekiest 12 yr old i know! But we let him get away with it. He cracks me up! Yet he is pretty knowledgable with all things fishy! I talk to him on MSN nearly every night and he amazes me at times!

Kamil

[quintrex101]

jason isalso a knowledgale person, wen i talk to him on msn he saids stuff and helps me out alot, he is very friendy person :headbang: :headbang:


please: jason give up the feralness, wats there to say to make u stop...... jason mate jason mate u can beat the feralness :rolling laughter:

[storms72]

I will pay that one Quinnie, you cheeky/funny little fellow. Greg the opinions shared here on all topics are great but as one persons opinion differs to anothers so do the maintenence recommendations of the manufacturers....I remember the Yamaha mechanics at the boatyard I worked at recommending running engines dry and have done a little research and found a reply to this exact question on another forum from what I would consider an expert (owner of Blakes Marine)....this may also help a few of you who own different brands of outboard to knowing the correct flushing procedure for your brand of outboard.

It depends on the type of oil injection system as to whether you should run it out of fuel or not.
A Bombardier or OMC product with a VRO should not be run out of fuel as it will keep pumping oil to try and compensate for the lack of fuel as it runs out of fuel, causing the carbies to be full of oil next time you try to start the motor. On the other hand a Yamaha, Mercury or Suzuki that injects the oil seperateley can be run out of fuel, as the oil is injected from a different source.
The best thing to do as has been previously stated in this thread is to try to run the motor every couple of weeks. Much better for the engine, battery and all electronics on the boat.
Happy Boating,
Alan Blake


Quinnie as you have the 30hp 3cyl yamaha which is oil injected-precision blend system it seems running it dry is recommended due to the oil injection system which will prevent the pistons from running dry of lubricant. This as previously stated will in the event that the outboard is not going to be used for over 2 months will prevent the mixed fuel gumming up in the carbies/fuel lines.

Cheers
Jason

[Haji]

Jason, I agree with your comments re running Yammies out of fuel when flushing the motor. I have always done this on all my outboard motors going right back to a 1964 Evinrude.

However it sounds as though Mr Blake adds a note of caution for other brands which should not be ignored. I would be inclined to check with the manufacturers handbook in each case as they generally include a section on flushing nad storage of motors. And Quinie, if you are now totally confused just think, Jason is like that all the time
:rolling laughter: :rolling laughter: :rolling laughter:

[James]

if its a non injected 2 stroke run it dry, as storm said the 2 stroke oil it will eventually bloke your carbis.

running any engine dry wont do any harm regarding running oil dry in your block as you can t seaze a motor which aint running all motors when switched have know oil in them due to a drop in oil pressure

[xtosea]

Lucky i stayed out of this one:confused2: , i've heard contradicting arguments both for and against, i did not want to start a :duel: . :lol: :rolling laughter:

[storms72]

Fight....no Kamil, just guys sharing their experience/knowledge, Greg was right and seeing as he has mercury ourboards his method is correct for his engine, no-one was disagreeing just sharing their method.

Just quickly James if your outboard is a pre-mix it would seem you arent supposed to run it dry, but you can once flushed undo the carbi fuel line to run the carby dry to avoid the gumming problem.

I did have a further look and can post the link if required which did comment that even with older pre-mix outboards there will be some residue of oil in the cylinders keeping them lubricated even if they are run dry because the oil isn't burnt like the fuel.
I will also post the correct method for storage of an outboard just in case anyone ever needs to do this.

Peace:cool-smiley: :ohhh yeah:
Jason

[beats]

Quinie uses the boat all the time there fore there is no need to run dry, thats the impression I got anyway. if mine sits for more than 6 weeks I get extreamly cranky & the mrs begs me to go for a fish, just to calm me down:smiile: :ohhh yeah:

[beats]

James, when a fourstroke engine starts the oil is still coated enough to protect untill oil presure builds, with a 2 stroke engine pre mix when the fuel is cut, the oil is cut. As fuel & lubricant reduces the reaction from combustion changes as the cylinder now has far more oxygen than fuel, therefore the firing flame burns excessivly hotter & can absolutely cause damage where there is no longer any protectoin. lawn mowers are no different, sure they start easier if you run them dry but you will find if you just shut off fuel tap after engine no probs either & you may even get a few more years outa your motor, I'd buy a carby diafram every 5 years or so rather than the cost of a rebuild on a worn out donk with no compression or holed power head. all to do with dollars & cents. BRP's E-Tec's state that they don't need servicing for 3 yrs. They don't mentoin anywhere that it is advised not to! I'd still service it.

[quintrex101]

No worries Daniel, if its outside i've beentold to have it trimmed all te way down.
Can anyone else help Quinnie?

Kamil

i got up in the moring and went outside to see it raining so i ran out there and put the motor down,


thanks for all the help :headbang:

[storms72]

I looked further into this today and after a chat to my old boss up the coast found out that the oil injection on Yamaha outboards is controlled by the pistons movement (he said via the crankshaft) other brands use the fuel flow to meter the oil needed, this being said makes it very clear it is impossible to damage the cylinders/pistons or rings on an oil injected 2 stroke yamaha outboard because even though there will be no more fuel to keep the engine firing there is still enough oil flowing to lubricate the combustion chamber.

Andre did say there would be no problem running it dry but he agrees with greg also only if the outboard is used reguarly and not left sit for periods of longer than 2 months or the gumming-up of lines and carbies will occur....He also said the gumming can be avoided by using fuel stabiliser called Stabil (can get this at most auto parts stores) and should be added prior to filling the tank.

Looks like we were both right greg, Cheers mate.

Jason

[beats]

ofcourse we were:lol:worst thing about fuels in unused states are the dies they use & the octain levels decrease with evaporatoin.

[Dog Catcher]

Have the motor down while it is stored, but that is normally applied to engines that are stored outside so that if it rains no water gets in th shaft and gearbox. It prolly wont matter that much if its in the shed, but to be safe leave it tilted down.



Kamil

Kamil your gearbox is sealed & no water can get inside it but yes always leave your motors in the down position as the case between gearbox & powerhead will carry & store water in it's crevices tilt your motor down & all that water will run off.

If using any of my boats consistantly say every few days opr so I dont bother flushing the motors only when I know I wont be going out & always run my 2 stroke dry different story with my 4 bangers no need to cause there's no oil + being fuel injected worse case senario if bad fuel or water has bypassed the water seperators & gotten into the motor it's just a simple case of bleeding the fuel canister.

One thing I would recomend to anyone though !

Dont waste your time spraying your powerhead with crap like WD-40 or similar it will evaporate & become useless after a week depending on the weather.

Take the cowls off any of my motors & you wont find a spec of corrorion or salt buildup, I use a foam lube to spray motors with about every 6 months or so it wont wash of & looks crappy + stays tacky but if you want to keep your donks in primo condition then use it

[xtosea]

Your a good man JG, thanks for that, i knew there was a reason, i could only remember so much! hehe

Kamil

[Dog Catcher]

Yeah mate storms pointed this thread out to me.

That case I was refering to has another name which eludes me @ present but all it does is make the motor look pretty as well as act as a pod to bolt your gearbox to.

Back in days of old it was very common to find long shaft & ultra long shaft motors the later more so popular on shark cats & besides having a longer shaft [ 4inches] the only other thing that changed on the motors was that case naturally it had to be 4 inches longer.

These days motors in the bigger HP clas come standard ultra long I should know I had to build up & weld an extra 4 inch's of transom hight to accomidate my 4 bangers

[Fishless]

Thanks for all the replys guys, :headbang:
it help me alwell:headbang:

[fishinf]

welcome to the site fishless
quinnie is a great kid but he cant be taking the credit for your fish

:rolling laughter: :rolling laughter: