boat motor fuel prob!

Post by **familybus** » Sat Oct 14, 2006 5:31 pm

ok its not 4x4 prob but i need some ideas on what could be my prob as im no expert on boat donks!
the prob is if i prime the bulb and pull start my 15hp Yamaha it starts and runs fine but after a while it starts to studder and then stalls! i can then primer it again and with the choke will start but then stalls again soon after! the primer bulb sucks itself in! so, would this then mean theres a blockage in line or something worse? when its not on the motor it seems to pump itself up with fuel nice and solid but when the motors running it again colapses! please any help to fix this prob would be a godsend as its already stuffed a beut day i had planned for me kids before they go back to school! thanks in advance blokes!

Post by **ronoor** » Sat Oct 14, 2006 6:03 pm

check the vent on the tank so it can suck air

Post by **BundyRumandCoke** » Sat Oct 14, 2006 7:21 pm

I agree, sounds like a vent problem. Try running it for a short while with the fuel cap loosened.

Post by **mudmacaca** » Sat Oct 14, 2006 7:44 pm

It is obviosly a fuel delivery problem.
As the others said
filters 1 in tank 1 before carby somewhere
Cracked fuel line sucking air

Just start by passing things untill you find it

I find the best time to test outboards is between 10pm and 2 am

Post by **familybus** » Sat Oct 14, 2006 8:01 pm

ok i thinks i got it! the fitting that goes into the tank is the same as what goes to the motor and the ball bearing on the fitting pushes back but does not push this pin thing in thats on the tank fitting wich allows fuel to come out! so to combat this i twisted, cut, broke then drilled the crappers out of the whole fitting on the tank only just smaller than the thread on a screw in barb fitting then hamerd a barb in with this thread lock stuff on it all the way in then just conected the hose straight to it with a hose clamp! ill try it out in the morn! thanks heaps for the sugestions gentlemen!

Post by **ronoor** » Sat Oct 14, 2006 9:18 pm

u heard the man between 10 pm and 2 am is the test time i'm still l'o'l

Post by **ronoor** » Sat Oct 14, 2006 9:18 pm

u heard the man between 10 pm and 2 am is the test time i'm still l'o'l

Post by **BundyRumandCoke** » Sun Oct 15, 2006 6:55 am

Err, Umm, speaking of fuel delivery hoses, you do have it on the correct way, dont you? Look for the arrow on the bulb. It points toward the motor, not the fuel tank.

Post by **patrolmad** » Mon Oct 16, 2006 3:06 pm

Sounds like a typical Yamaha outboard. I am on my second one and they have both been the same.

Post by **pongo** » Mon Oct 16, 2006 3:24 pm

patrolmad wrote:Sounds like a typical Yamaha outboard. I am on my second one and they have both been the same.

Please elobrate. I am in the new outboard motor market. I would like to know how unhappy you are , and what your happy with.

I was thinking of a tohatsu ?

Maybe a PM if you dont want everyone to know.

thanks

Post by **patrolmad** » Mon Oct 16, 2006 3:56 pm

My previous motor was a low houred 1998 25HP Yamaha CV (2 stroke) and I currently have a 2004 40HP Yamaha with approx 150 hours on it. Both motors are always difficult to start unless you prime them almost to the extent that the hose feels ike it is about to bust. Once started they would never idle properly despite several trips to mechanics for services and tuning etc.
IMHO a Mariner/Mercury is the only way to go. I owned a 1990 Mariner 2 stroke which had an absolute caning with many trips to NT and the Cape floating around in trailers and the backs of utes which never missed a beat and started first go every time. It was submerged three times and after removing the spark plugs and pumping the water out and draining the carby it fired up every time no dramas. I have a few mates with them, one is a pro fisherman in the Gulf and he swears by Mariners.
Although Yamaha has a good name, in my experience, the Mercury/Mariner is a far better motor.

Post by **dirtyGQ** » Mon Oct 16, 2006 5:44 pm

mate if you are in the market for a outboard you are thinking of the right one when you say tohatsu because the tohatsu is just the commercial version of a mercury and mariner all the same in the 2 strokes ,except cowling and colour. If you are after a 4 stroke i wouldn't look past the suzuki 4 strokes, best warranty etc.. and meet the 06 protocol for emmissions

Post by **pongo** » Mon Oct 16, 2006 6:58 pm

dirtyGQ wrote:mate if you are in the market for a outboard you are thinking of the right one when you say tohatsu because the tohatsu is just the commercial version of a mercury and mariner all the same in the 2 strokes ,except cowling and colour. If you are after a 4 stroke i wouldn't look past the suzuki 4 strokes, best warranty etc.. and meet the 06 protocol for emmissions

Yeah thats what i was told last year. I am concerened about dealer backup with tohatsu, as ive heard that they arent the best. Also with merc, you can get parts anywere and everwhere. I wonder if tohatsu parts are actually the same even though they build the powerheads for mercury. Im only chasing a 15 hp.

thanks guys

Post by **bastard** » Mon Oct 16, 2006 7:10 pm

They are all as good as one another now.

Post by **pongo** » Mon Oct 16, 2006 7:36 pm

bastard wrote:They are all as good as one another now.

Just like Holden/ford/toyta/mazda

and toyota/nissan/kia/porche/bmw/landrover

Yeah right man, They are similiar but they are different. Johnsone and evinrude are the same

cheers

Post by **bastard** » Mon Oct 16, 2006 7:40 pm

Try and pick a common fault with any of this years line ups and when you can tell me what it is.

Post by **dirtyGQ** » Mon Oct 16, 2006 8:37 pm

pongo wrote:
dirtyGQ wrote:mate if you are in the market for a outboard you are thinking of the right one when you say tohatsu because the tohatsu is just the commercial version of a mercury and mariner all the same in the 2 strokes ,except cowling and colour. If you are after a 4 stroke i wouldn't look past the suzuki 4 strokes, best warranty etc.. and meet the 06 protocol for emmissions
Yeah thats what i was told last year. I am concerened about dealer backup with tohatsu, as ive heard that they arent the best. Also with merc, you can get parts anywere and everwhere. I wonder if tohatsu parts are actually the same even though they build the powerheads for mercury. Im only chasing a 15 hp.

thanks guys

mate i have a 9.9 tohatsu and also a 200 mercury the parts for both are relatively easy to get. the 15 horsepower is actually more expensive than the 18 horse tohatsu..

Post by **familybus** » Mon Oct 16, 2006 10:20 pm

patrolmad wrote:Sounds like a typical Yamaha outboard. I am on my second one and they have both been the same.

as per my last post, it was the feul tank that was the prob! it had nothing to do with the motor!

Post by **patrolmad** » Tue Oct 17, 2006 8:45 am

The fuel tank is fine, they just don't idle...

Post by **familybus** » Tue Oct 17, 2006 9:10 am

patrolmad wrote:The fuel tank is fine, they just don't idle...

ok sorry then! i fixed the prob with the fuel tank and now its runnin fine but you seem to know more about my motor than i do!

Post by **patrolmad** » Tue Oct 17, 2006 9:20 am

I must have bought two Friday Arvo builds.

Post by **V8 Middy** » Tue Oct 17, 2006 5:12 pm

At our surf life saving club, we have gone from Johnno to Mercury to Tohatsu in the space of about 13 - 14 years. The Mercs were great especially top end and were reliable but cavitated too much during tight manouvers. We have had 3 tohatsu's now and they all rock!!! No hassles with them and we thrash them. (Granted we warm them up forst and flush them every day)

The 30Hp Toy is just a 25 with a restriction in the inlet. Swap for a $5 gasket and bang, u have 30HP

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boat motor fuel prob!

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