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Suzuki df4 4hp 4stroke outboard will not start and will not even fire after leaving petrol in during winter. fuel to carb ok. slosh a small amount of fuel into air inlet on carb then it fires but will not run. Taken out and cleaned the jet on the top of the carb but still no good. Do I need to strip the carb & if so how difficult is it to get it back together and what replacement parts do i need if any. any other ideas please? The engine is 4 years old.

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  • Suzuki Master
  • 1,190 Answers

Totally strip carb and clean properly ! as u take it all apart lay it out in order on work top , even take notes etc ! pictures even ! easy !

Posted on Jun 08, 2014

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Posted on Jan 02, 2017

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SOURCE: Hello, I have a 2001 Suzuki 5hp outboard. 2

Check the needle valve that the float holds in position is free to move if it is check the float is working OK ie.whole and intact.

Posted on Sep 09, 2010

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SOURCE: My 2 stroke 3 cylinder carbureted 90 hp Yamaha

Just pull them apart and clean.

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Posted on May 20, 2011

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SOURCE: tohatsu outboard 15hp 2 stroke was running great,

First: with flashlight or mirror look down the carb- with switch off- and gear and throttle wide open and see what the butterfly valve inside there is doing. It should be parallel to the air flow.

If not you need to find the actuator am and be sure it moves with the control and opens all the way.

Next make sure the timing plate under the flywheel moves at the same time the throttle is opened. Then -using timing light- see if the timing is set to the correct "wide Open throttle" - this is a 2 man job done at sunset with good marks on the flywheel (don't wear a tie). This can also be done static by running it out of gas and using the pull cord- if it has no safety interlock.

Last- and the saddest part- is the compression test. The strength of the reading is not as important as the similarity. When I worked on Chryslers, they were bad if the two readings were as little as 8# apart. The minimum reading should be over 80#.

Posted on May 26, 2011

  • 605 Answers

SOURCE: Hello i have a Suzuki

Hi, basically the carby needs to be stripped down and all jets cleaned out. Also the idle speed may be set to low. Hope this helps, regards Phil.

Posted on Sep 06, 2011

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it sounds to me like the carb float levels are out of adjustment and it is overfilling the bowls,or,the needle valve seats are worn and leaking,which will allow fuel to continue filling the bowls even though it looks like they are closed,remove the carbs from the bike,remove the bowls,turn the cabs upside down close the floats(push them right to the top,this simulates full bowls)then blow throgh the fuel inlet pipe,if you can hear air escaping from around the seats they are faulty,also check that the seats themselves are tight in the carb body,i dont know why but gsxr carbs seem to shake the valve seats loose..hope this helps

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