VKCOMMO's VKTINNIE

[VKCOMMO]

Hey all

Heres another thing to add to the list. VKTINNIE. Started ages ago when i wanted a boat, but never got around to buying it. Found this on eBay last night, went and took a look and offered him cash with some help from dad now for it, he took it, and i took the boat.


Model: Unknown year Brooker Cartopper 12' tinnie
Engine: Yamaha 15hp and Minn Kota endura transom mount 38lb
Engine Type: 15hp, 2-Stroke, 2 Cylinder
Displacement: 246 cc (15.0 cubic inches)
Bore x Stroke: 56 x 50 mm (2.21 x 1.97 in)
RPM Range: 4,500-5,500 RPM
Lubrication: Pre-Mix 100:1
Oil Type: TCW III 2-Stroke Oil
Fuel Delivery: Single Venturi Carburetor
Fuel Type: Unleaded Premium
Controls: Tiller Handle (Hand Driven)
Starting: Manual Start
Gear Ratio: 2.08:1
Gear Shift: F-N-R (front-mounted shifter)
Propeller: 9.25 Dia. x 10.5 Pitch (aluminum)
Fuel Line: YAMAHA Fuel Line with hand prime pump
Fuel Tank: 26L
Shaft Length: 15" Short Shaft ONLY
Engine Weight: 79 lbs (36 kg)
Colour: Unpainted aluminium
Rims: Stockies on the trailer.
Mods:
-Eagle 128 fish finder
-Battery that charges off the Yamaha
Transmission: T5
Price: Not telling...
Future Mods:
-Change wheel bearings on trailer to commodore stud
-Fit old VR clubby rims
-Clean engine, took a look inside it last night and in the cylinder it is as dirty as ####
0-100Kph: Hasn't even touched water yet

[HamaTime™]

Paint it white and take it fishing!

[Maxxiz]

First thing I'd be doing is getting a bigger motor, you wont be goin to fast with at 15hp!

[VKCOMMO]

Paint it white and take it fishing!

Tossing up paint or not for it really

First thing I'd be doing is getting a bigger motor, you wont be goin to fast with at 15hp!

Dont want a fast boat really, Just something reliable and to fish with.. But might go bigger carb or something..

thinking of ####ing around with AVGAS in it as well

[Fun_Bucket]

Don't put avgas in it, your typical standard 2 stroke outboard would be lucky to make the most of 95.

Also a bigger carb wouldn't achieve much, infact you would struggle to even find one that fits. The 15 hp shares the same dissplacement as the 9.9, so it's allreay at it's max rating from the factory. You could slightly advance the timing but that would be it. A decent prop would be about as far as your could go bolt on wise, without tearing down the motor.

[VKCOMMO]

What kind of prop? Whats the pro's and cons to it?

I was under the impression (informed) that the 20 was just the 15 with a bigger carb

[Fun_Bucket]

The 15 F shares the same power head as the 9.9 F. The 20 HP is the "D" model, and uses a different power head, 395 cc compared to 246cc. The 20 D head is shared again with the 25 N.

2 stroke portable marine-outboard Products | Yamaha Motor Australia

If you click on the motors you can bring up the full specifications below each one.

Factory props are usually fairly good for all round performance. Generally when you change a prop it is for a specific reason. With any gain from a prop change, there is usually a sacrifice in another area.

A prop that has better hole shot might sacrifice top speed, and vice versa. It depends what you want to do with the boat.

[VKCOMMO]

OK.. Thanks

Well a bit of an update.. I finally took it out on the water.. The rollers on the trailer dont work but that doesnt matter...

So I noticed this a few days ago but thought it was excess oil from the exhaust, but I might have been wrong. Around the prop there was oil...

anyway, Back to the story..

I took it out, it was going great, had it full throat for a while, then I stopped it for a bit to grab something out of the front, and really shortly after I put it to idle (in forward it was) it died, the it took a couple of pulls to start, got it going again, got about another 30 seconds of it going until it slowed down and died... Not sure whats up with it, I'm hoping its just fouled plugs or something but im not sure as I dont know outboards...

So yeah, The electric got a good working out, full throttle for about 300m against the current... Finally got back to shore, got it in the parking lot and it started after 2 pulls so IDK whats up with it...

[Verynice]

lol thats comical

i can imagine you now, stuck in a lake, trying to start your motor lol

[Tom_1569]

Nice little tinnie mate.
15hp will be heaps, I have a 16hp Suzuki on mine, and mine is only slightly bigger/heavier and it still gets up and goes in the rivers.
With a bit of a tidy up you will be laughing and fishing away all day.

"Lubrication: Pre-Mix 100:1", Your not mixing the fuel 100:1 are you? Outboard motors should be running 40:1 with Outboard 2-stroke oil. I run BP Ultimate, because I figure Fuel loses its Octane rating after sitting for a while, and the boat may sit for months on end, so best off starting with a higher octane rating.

The rollers on the trailer jam up after not being used, salt and sand and what not gets into them, if they dont free up after whinching the boat on a few times, replace them, there pretty cheap from memory.

We have the same fish finder, what do you think of it? Mine seems to be very inconsistent, but is good enough for a depth sounder in shallow rivers.

[VKCOMMO]

lol thats comical

i can imagine you now, stuck in a lake, trying to start your motor lol

It involved a lot of swearing and pulling.. Sort of like when I was 13

Nice little tinnie mate.
15hp will be heaps, I have a 16hp Suzuki on mine, and mine is only slightly bigger/heavier and it still gets up and goes in the rivers.
With a bit of a tidy up you will be laughing and fishing away all day.

"Lubrication: Pre-Mix 100:1", Your not mixing the fuel 100:1 are you? Outboard motors should be running 40:1 with Outboard 2-stroke oil. I run BP Ultimate, because I figure Fuel loses its Octane rating after sitting for a while, and the boat may sit for months on end, so best off starting with a higher octane rating.

The rollers on the trailer jam up after not being used, salt and sand and what not gets into them, if they dont free up after whinching the boat on a few times, replace them, there pretty cheap from memory.

We have the same fish finder, what do you think of it? Mine seems to be very inconsistent, but is good enough for a depth sounder in shallow rivers.

Thanks mate, Yeah, When it was running the 15 was plenty...

Yeah, I was mixing 100:1, Thats all ive heard off the internet for my model engine...

Yeah, I used premium, Its like 20c more per tank so I hardly notice...

Yeah, Just going to replace/WD:40 them

I honestly havent used my fish finder...

[Commydoor]

did you have the air bleed on the tank open?...when stored its closed when in use you crack the bleed to allow air in or it creates a vacuum in the tank...i think the boat needs a 2 tone paintjob and some aerials on the front with foxtails or little aussie flags on pmsl...

[Tom_1569]

After a quick google it seems 100:1 is the correct ratio, seems odd.

How'd your electric motor go, I want to get one, but have no idea what size to get or whether to front or rear mount it.

[VKCOMMO]

did you have the air bleed on the tank open?...when stored its closed when in use you crack the bleed to allow air in or it creates a vacuum in the tank...i think the boat needs a 2 tone paintjob and some aerials on the front with foxtails or little aussie flags on pmsl...

I didnt do that, That might have caused it.. But when I got back to shore it started and idled for a while.. Maybe the bleed valve was slowly letting air in on the way back...

After a quick google it seems 100:1 is the correct ratio, seems odd.

How'd your electric motor go, I want to get one, but have no idea what size to get or whether to front or rear mount it.

The lecky went great, saved my ass. Since the front of the boat is pointy and I dont have a TIG, I just put it next to the outboard and it works well...

[Tom_1569]

Not having the breather open will most likely cause the issue you experienced, we have all forgot to undone at one point or another so dont stress.

How was the steering one the lecy when rear mounted?

[VKCOMMO]

Not having the breather open will most likely cause the issue you experienced, we have all forgot to undone at one point or another so dont stress.

How was the steering one the lecy when rear mounted?

That was probably what it was then..

Umm, I mounted it in a hurry (as I was being drifted towards the trees and shit as the lake has recently risen by over a metre) and I had full steering capacity, Just had to have the outboard in the water.

[VKCOMMO]

Took it to the mechanic.. He said the waterpump's teeth have been sheared off so there was no cooling system on the boat...

So $150 to him and we should have a new pump in by monday...

[Commydoor]

lol...so you overheated the boat motor...watch out for a blown head gasket now

[VKCOMMO]

No, It has a cutoff thing so if i gets too hot it just cuts it to stop a blown head gasket...