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10-11-2013, 08:27 PM
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#1
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Registered User
Country: england
Location: gods country
Occupation: chief bodger
Interests: boats / fishing
Boat name: will it float
Boat make: dory
Engines: mercury
Cruising area: near the life boat station
Join Date: Jun 2011
Location: gods country
Posts: 12
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Yamaha malta
hello all
need some advice on an Yamaha Malta outboard , the motor runs ok but not sure if any water is going round the engine should there be a tell tail and where on the motor is it, also half way down the leg there is a rubber cap which is slightly damaged would stop water circulating or could the impeller be broken, any advice welcome as i am new to this.
thanks boogty
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11-11-2013, 07:56 PM
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#2
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Registered User
Country: uk
Location: up north
Interests: boats
Boat make: Avenger 21
Engines: merc 150 il6
Cruising area: in my pond
Join Date: Nov 2012
Location: up north
Posts: 57
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yamaha
Yamaha 3hp may be a bit small for the boys on this forum ! pull the gearbox and check out the impellor, 4 bolts underneath and undo the bolt under the grommet your talking about and the box should pull down, take the impellor housing off and voila one knackered impellor !
id stick to fordson majors if I was you mr A
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11-11-2013, 08:10 PM
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#3
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Registered User
Country: Ireland
Location: Dublin
Occupation: Boatbuilder
Boat make: Hydrostream V-king, 650SS OCR ,Ring 21, Ring 18, Phantom 18.
Engines: 300Hp Mercury 2.4, 130 Yamaha, Bridgeport EFI, XR6, Merc 200.
Cruising area: Malahide, Dublin
Join Date: May 2004
Location: Dublin
Posts: 1,803
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The black cap on the side is just to gain access to the shift shaft coupler.
The tell tale on a malta is out through the exhaust relief half way up the back of the leg. It doesnt pump like a standard tell tale does, but more spits with exhaust gas. As long as there is a healthy spray from here youre good to go.
If no spray replace the impeller, or it could be a salted up block..
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11-11-2013, 09:05 PM
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#4
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Registered User
Country: England
Location: Salcombe, Devon
Occupation: Marine Engineering and Storage
Boat name: Puffin
Boat make: Westerly 21
Engines: Lister Petter 6.6
Cruising area: Plymouth to Exmouth
Join Date: Sep 2013
Location: Salcombe, Devon
Posts: 225
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watch this video you can see it clearly,
it will probably be the water passages blocked with salt or the impeller. a word of advice, before you try these just find the tell tale hole and stab it with a straw of a wd40 can or something of a similar gauge and rigidity and give it a reaming (im sure reaming will make people laugh) as salt and grit deposit there and blocks the passage. does the head get hot quickly?
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11-11-2013, 09:09 PM
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#5
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Registered User
Country: Ireland
Location: Dublin
Occupation: Boatbuilder
Boat make: Hydrostream V-king, 650SS OCR ,Ring 21, Ring 18, Phantom 18.
Engines: 300Hp Mercury 2.4, 130 Yamaha, Bridgeport EFI, XR6, Merc 200.
Cruising area: Malahide, Dublin
Join Date: May 2004
Location: Dublin
Posts: 1,803
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There is no tell tale on a yamaha malta!!!!
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11-11-2013, 09:20 PM
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#6
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Registered User
Country: England
Location: Salcombe, Devon
Occupation: Marine Engineering and Storage
Boat name: Puffin
Boat make: Westerly 21
Engines: Lister Petter 6.6
Cruising area: Plymouth to Exmouth
Join Date: Sep 2013
Location: Salcombe, Devon
Posts: 225
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Quote:
Originally Posted by Hydrostream
There is no tell tale on a yamaha malta!!!!
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strange, I have a couple in the workshop and they have tell tales. it is just a hole in the upper casting bracket but it should flow water. in the video it has one as well. this is if we are talking about a 3hp malta.
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11-11-2013, 09:35 PM
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#7
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Registered User
Country: Ireland
Location: Dublin
Occupation: Boatbuilder
Boat make: Hydrostream V-king, 650SS OCR ,Ring 21, Ring 18, Phantom 18.
Engines: 300Hp Mercury 2.4, 130 Yamaha, Bridgeport EFI, XR6, Merc 200.
Cruising area: Malahide, Dublin
Join Date: May 2004
Location: Dublin
Posts: 1,803
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Where is it? I had one here last week that wasnt pumping water, wasnt a tell tale on it. Theres a hole alright, right behind the handle, in the middle of the lower casing, but it goes nowhere!
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11-11-2013, 09:39 PM
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#8
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Registered User
Country: Ireland
Location: Dublin
Occupation: Boatbuilder
Boat make: Hydrostream V-king, 650SS OCR ,Ring 21, Ring 18, Phantom 18.
Engines: 300Hp Mercury 2.4, 130 Yamaha, Bridgeport EFI, XR6, Merc 200.
Cruising area: Malahide, Dublin
Join Date: May 2004
Location: Dublin
Posts: 1,803
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Ok, so had a look at youtube as doubting myself now and true enough theyre pumping water from a tell tale. So appologies, youre right.
But the one here certainly didnt have any tell tale anywhere on it!
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11-11-2013, 09:40 PM
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#9
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Registered User
Country: England
Location: Salcombe, Devon
Occupation: Marine Engineering and Storage
Boat name: Puffin
Boat make: Westerly 21
Engines: Lister Petter 6.6
Cruising area: Plymouth to Exmouth
Join Date: Sep 2013
Location: Salcombe, Devon
Posts: 225
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Quote:
Originally Posted by Hydrostream
Where is it? I had one here last week that wasnt pumping water, wasnt a tell tale on it. Theres a hole alright, right behind the handle, in the middle of the lower casing, but it goes nowhere!
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that's weird. that is where it should be. if you take off the powerhead you can see the cast passages that run right above it and should allow a steady flow out.
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11-11-2013, 09:44 PM
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#10
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Registered User
Country: Ireland
Location: Dublin
Occupation: Boatbuilder
Boat make: Hydrostream V-king, 650SS OCR ,Ring 21, Ring 18, Phantom 18.
Engines: 300Hp Mercury 2.4, 130 Yamaha, Bridgeport EFI, XR6, Merc 200.
Cruising area: Malahide, Dublin
Join Date: May 2004
Location: Dublin
Posts: 1,803
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Yeah, had powerhead off to clean it out, but there wasnt any hole. This is a hole in the centre straight behind the handle. Put a piece of wire through it and it comes out under the cylinder head! There was no other hole in it.
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11-11-2013, 09:59 PM
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#11
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Registered User
Country: England
Location: Salcombe, Devon
Occupation: Marine Engineering and Storage
Boat name: Puffin
Boat make: Westerly 21
Engines: Lister Petter 6.6
Cruising area: Plymouth to Exmouth
Join Date: Sep 2013
Location: Salcombe, Devon
Posts: 225
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Quote:
Originally Posted by Hydrostream
Yeah, had powerhead off to clean it out, but there wasnt any hole. This is a hole in the centre straight behind the handle. Put a piece of wire through it and it comes out under the cylinder head! There was no other hole in it.
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was it defo a malta? sometimes people use Yamaha/mariner (before merc (Brunswick) owned mariner) head on them and the tell tale is supposed to come out the side on a long pipe but it gets blocked off. was it all original or do you think it could be a rebuild using whatsnots.
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11-11-2013, 10:02 PM
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#12
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Registered User
Country: Ireland
Location: Dublin
Occupation: Boatbuilder
Boat make: Hydrostream V-king, 650SS OCR ,Ring 21, Ring 18, Phantom 18.
Engines: 300Hp Mercury 2.4, 130 Yamaha, Bridgeport EFI, XR6, Merc 200.
Cruising area: Malahide, Dublin
Join Date: May 2004
Location: Dublin
Posts: 1,803
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Haha, no defo all original. I'd say it was the first time head was even off! Original yam gaskets!
Just a weird one! Ran in test tank for near an hr so was certainly cooling.
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11-11-2013, 10:05 PM
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#13
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Registered User
Country: uk
Location: up north
Interests: boats
Boat make: Avenger 21
Engines: merc 150 il6
Cruising area: in my pond
Join Date: Nov 2012
Location: up north
Posts: 57
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Having looked at boogtys malta this evening it has no tell tale just the hole behind the handle as hydrostream says, very strange, he has now pulled the impeller and its totally perished away to a stub !
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11-11-2013, 10:10 PM
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#14
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Registered User
Country: England
Location: Salcombe, Devon
Occupation: Marine Engineering and Storage
Boat name: Puffin
Boat make: Westerly 21
Engines: Lister Petter 6.6
Cruising area: Plymouth to Exmouth
Join Date: Sep 2013
Location: Salcombe, Devon
Posts: 225
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I have just found this on another forum as seemed very strange both my customer have it and yours didn't.
'Depends on the model. Later models had a "tell tail" of water that exited in a continuous stream from under the rear of the power head. Earlier models (like mine) had a barely visible "stutter" from about half way down the leg--the bulk exiting through the exhaust. Best thing to do is fill a wheelie bin two thirds full with water and clamp the engine to the edge. Run in gear at around half to two thirds throttle for a goodly period of time and see if it overheats. Reccomendation is for a 100 to 1 two stroke mix which I personally think is a bit on the lean side.'
so both right yeh.
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11-11-2013, 10:29 PM
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#15
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Registered User
Country: england
Location: gods country
Occupation: chief bodger
Interests: boats / fishing
Boat name: will it float
Boat make: dory
Engines: mercury
Cruising area: near the life boat station
Join Date: Jun 2011
Location: gods country
Posts: 12
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Thanks for all the advice guys , like born free says the impeller is knackered , when did they start putting tell tails on these motors as I think mine was made in 1990
Thanks Boogty
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11-11-2013, 11:36 PM
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#16
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Registered User
Country: England
Location: Salcombe, Devon
Occupation: Marine Engineering and Storage
Boat name: Puffin
Boat make: Westerly 21
Engines: Lister Petter 6.6
Cruising area: Plymouth to Exmouth
Join Date: Sep 2013
Location: Salcombe, Devon
Posts: 225
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Quote:
Originally Posted by boogty
Thanks for all the advice guys , like born free says the impeller is knackered , when did they start putting tell tails on these motors as I think mine was made in 1990
Thanks Boogty
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cool, the 2 in my workshop are 95 & 98 so being a 90 it would figure why yours doesn't have a tell tale. hydro what year was the one you worked on?
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13-11-2013, 09:52 PM
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#17
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Registered User
Country: england
Location: gods country
Occupation: chief bodger
Interests: boats / fishing
Boat name: will it float
Boat make: dory
Engines: mercury
Cruising area: near the life boat station
Join Date: Jun 2011
Location: gods country
Posts: 12
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aye up guys
looking at the motor tonight there's a small hole under under the power head so put the air line on and the air came out of the pipe that goes to the pump so seems like it has a tell tail , just waiting for my new impeller now to come through the post and i am sorted, thanks again for all the advice.
boogty
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13-11-2013, 10:00 PM
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#18
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Registered User
Country: Ireland
Location: Dublin
Occupation: Boatbuilder
Boat make: Hydrostream V-king, 650SS OCR ,Ring 21, Ring 18, Phantom 18.
Engines: 300Hp Mercury 2.4, 130 Yamaha, Bridgeport EFI, XR6, Merc 200.
Cruising area: Malahide, Dublin
Join Date: May 2004
Location: Dublin
Posts: 1,803
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You sure its not just the drain hole behind the handle?
This was bugging me, so checked another malta and it had a tell tale on the port side.
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14-11-2013, 09:20 PM
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#19
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Registered User
Country: england
Location: gods country
Occupation: chief bodger
Interests: boats / fishing
Boat name: will it float
Boat make: dory
Engines: mercury
Cruising area: near the life boat station
Join Date: Jun 2011
Location: gods country
Posts: 12
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Yes fairly sure also put the air line on the pipe that comes from the pump and air comes out of small hole just behind the handle , will know for sure when I get it back together .
Boogty
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