gary davies-jones Posted June 2, 2009 Share Posted June 2, 2009 Hi anyone out there play with real boats and outboards? I've got a Suzuki DT8 outboard which refuses to start. It's got: sparks petrol/oil mix compression on both pots and a very stubborn nature. Iv'e tried all sorts, including throwing away the old "stale" petrol and filling with clean new stuff. Any suggestions wolud be usefull. And yes i have thought of using it as an anchor. Thanks Gary Quote Link to comment Share on other sites More sharing options...
Bruce Richards Posted June 2, 2009 Share Posted June 2, 2009 Is the fuel getting into the cylinders (can you smell it if you take the plug out is the pl,ug "wet")? If not the main jet may be blocked in the carb. Quote Link to comment Share on other sites More sharing options...
Klippy Posted June 2, 2009 Share Posted June 2, 2009 Hi Gary, 1/ are the plugs 'wet' when you take them out. If yes then blow out as much fuel as you can and crank (pull) until no vapure comes out of the plug holes, and try again. 2/ If plugs are 'dry' then use an oil can to squirt 2 stroke mix into the plug holes and try again. 3/ if this persuades it to fire, or even run for a few revs, then try squirting direct into the carburettor. Most outboards use reed valves between the carburettor and the cylinder, these may be stuck closed (quite common) A squirt of fresh petrol often solves this. You may need some elixer of the single Malt kind to cure the pain the blisters give. They're the ones between the first and second fingers of your pulling hand! Ask me how I know Quote Link to comment Share on other sites More sharing options...
Myron Beaumont Posted June 2, 2009 Share Posted June 2, 2009 Can't be any worse than the Seagull I endured for several years !Edited By Phil Wood - Moderator on 02/06/2009 19:42:19 Quote Link to comment Share on other sites More sharing options...
Former Member Posted June 2, 2009 Share Posted June 2, 2009 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
gary davies-jones Posted June 3, 2009 Author Share Posted June 3, 2009 Hi guys, right then, so far the plugs are wet, occasionally it tries to fire with a little splutter. Once all the unburnt fuel in the exhaust ignited with a huge bang, very spectacular. I have tried squirting fuel directly into the cylinders, and the carb throat (still no effort from it). The read valves are not stuck (been in there and checked/cleaned). When constantly yanking the string (requisit blisters and all) the smell of raw petroil mix from the exhaust changes to the smell of burnt two stroke mix and a faint blue haze rises from the exhaust, which hints at combustion. I have tried cleaning the carb jets, but have been told that scrubbing with a tooth brush (hate the taste of petrol afterwards, must remember to use the wifes next time) is pretty inefective. I'm told I need an airline to get things moving. I have recently sold my Seagull 40 minus (1954 vintage), and found that it used to be very economical and very reliable as long as the points were clean. The only problem with it was the lack of power and the blue cloud that followed you everywhere. Not that surprising really with a 10:1 mix. I'm regretting selling it now. Odd thing is Seagulls seem to engender either love or hate. In swansea the dealers, marine suppliers, boatyards, and boaters seem to hate them. Move 20 miles west to BurryPort and they are reverred and sought after by the boat yards and fishermen there. Personally I'm beginning to dislike suzukis, just wish I could get it to fire. Thanks guys Gary Quote Link to comment Share on other sites More sharing options...
Martin Harris - Moderator Posted June 3, 2009 Share Posted June 3, 2009 I have very little experience of outboards but perhaps the ignition is weak and not sparking under compression? Otherwise, is there any possibility that the ignition timing could be way out? A common cause of head scratching on two smokes is failed crankcase seals leading to loss of primary compression and a weak mixture. However, if your plugs are getting wet then it's probably not that. Quote Link to comment Share on other sites More sharing options...
kiwi g Posted June 3, 2009 Share Posted June 3, 2009 Ive played wih out board motors. I currently have a 70 johnson on my boat. Is the fuel squeegee full and hard. inspect the valve at the top of this to make sure this isnt the problem. Dry the plug and check for spark but the out board coils dont like being charged without disscharging to the plug . its bad for them. If you have a spark, fuel, it will go unless . Sounds like fuels getting in. Backfire would suggest timing issues. I once had a motor that when it backfired it would move the fly wheel on the crankshaft enough to almost shear the woodruff key. this would be enough to upset the timing. the cure was a new key and chalk on the cranktaper to hold it in place once touqed down. Another thing that will stop a two stroke outboard from running is failing gaskets , mainly between the block halves. as much as a pin hole would cause problems starting from hott. Another is Suzuki.. They have a bad tendnecy to corrode inside out. If you are having trouble starting in the water it could be that water from the inner jacket or exhaust jacket is entering the cylinder.. To see if it is try starting breifly out of the water to see if it starts. Remember though the water pump needs water to run in. Hope this helps Kiwi g Quote Link to comment Share on other sites More sharing options...
kiwi g Posted June 3, 2009 Share Posted June 3, 2009 OH and try not to choke it too much. alot of motors need only to get the fuel up to the cylinder. try a half choke if it fires Quote Link to comment Share on other sites More sharing options...
Klippy Posted June 3, 2009 Share Posted June 3, 2009 Hi Gary, I go with Kiwi G, you might be having problems with the Crankshaft seals. Two strokes must be stored with the rotational line of the crankshaft downwards! This is why strimmers must be stored upright in the corner of the shed, otherwise the crankshaft lays on the seals and deforms them. If this motor was stored for a long time on the 'lift' cams of the main bracket, this may have happened. I have had success in the past with putting a 50/50 mix of petrol and ATF (Automatic transmission fluid). This is an old mechanics trick to 'fix' hydraulic tappets by expanding the rubber seals. Leave the mix well shaken in the engine for a day or so and try again. Quote Link to comment Share on other sites More sharing options...
gary davies-jones Posted June 3, 2009 Author Share Posted June 3, 2009 thanks guys, a lot more to try, if the ATF/petrol trick doesn't work I'll invest in a gaskit set and have a rebuild session. While I'm at it i'll change those seals as well. Gary Edited By gary davies-jones on 03/06/2009 19:58:20 Quote Link to comment Share on other sites More sharing options...
Former Member Posted June 7, 2009 Share Posted June 7, 2009 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
Doug Ireland Posted June 7, 2009 Share Posted June 7, 2009 Is the pull cord wound on in the right direction? You may be trying to start the engine backwards. Ok, I'm leaving now.... Quote Link to comment Share on other sites More sharing options...
Klippy Posted June 7, 2009 Share Posted June 7, 2009 Good thought Doug, seen it before! Quote Link to comment Share on other sites More sharing options...
kiwi g Posted June 7, 2009 Share Posted June 7, 2009 Ha ha that would be funny, especially winding it on to a recoil start motor like the suzuki dt8. it would make a mess of the spring too. Good thinking though guys ,nothing to say hes using the recoil system. Have you had any luck getting it going... Quote Link to comment Share on other sites More sharing options...
gary davies-jones Posted June 7, 2009 Author Share Posted June 7, 2009 Hi Guys, yes it is a recoil starter, and no it wouldn't be funny. Well yes actually it would, but I'm not sure I'd laugh at the moment. By the way the flywheel turns clockwise when viewed from above. Now since this means that as the advance happens it rotates the base plate anticlockwise. That is right isn't it? I have at this time given up. A friend of a friend, it turns out, runs a business repairing and breaking outboards for spares. Long and the short of that is he's going to have a look at it at mates rates. Gary Quote Link to comment Share on other sites More sharing options...
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