Suzuki 65hp, engine cutting out

[paulmuzzer1]

HI all, I was wondering if anyone has had the same problem as i am having, here goes,<br /><br />The engine i have got has been re-built by Docklands boat yard in Portsmouth about 18mths ago, after this it was run but then left to stand for 12-18mths before i bought it. having seen that it was re-built i thought it would not need a service and all should be well. how wrong was i.<br /><br />The engine start first turn of the key and ticks over perfectly well, i can put it into gear fine and it will go like the clappers. however, after just 100-200 yards the engine will just cut out and die. i put it into neutral and it will (sometimes) start back up but sometimes it wont. after a short while the engine will start and tickover fine as though nothing was wrong however, when i put it into gear it will either cut out straight away or will only let me get small rev's.<br /><br />I moored up to a jetty after having a scary engine failure in the middle of Conwy esturary in pretty rough conditions, i took off the fuel filter on the side of the engine and cleaned it out. this would have taken me about 30 mins which give the engine time to cool down, once i done this the engine seemed ok, so i went out and give it another go, it done exactly the same again.<br /><br />I have felt the tell tale for over heating and it was cool water, however, i whilst it was on tick over i felt the cylinders, number 1 seemed to be slightly hotter than number 2+3. could this be my problem?<br /><br />I have been told that this engine has got a sensor on the head that will cut the engine if it gets too hot, i dont feel that the engine is getting too hot but i am not a mechanic and this might not be the problem.<br /><br />Any advise would be greatly accepted as i cant use my boat until i get it sorted out.<br /><br />Kind regards<br /><br />Paul Murray

 

[deejaycee_2000]

Re: Suzuki 65hp, engine cutting out

Welcome to iBoats <br /><br />These 65hp suzuki mostly have all the same problems, when 1 starts the others will follow, the main thing that fails about this engine is the fuel pump diaphram and then the sensors and oil problems, but before we go into that, did you get any warning lights or anything? ... post here exactly what lights and warnings comes on when this happens etc. Cause what I can understand from your information "into gear it will either cut our straight away" means fuel, and "only let me get small rev's" means an oil problem ....

 

[paulmuzzer1]

Re: Suzuki 65hp, engine cutting out

Hi, thanks for replying so quickly, i don not get any audible or visual signs what so ever, it just dies. i dont know what to say. should i be getting any?<br /><br />Thanks

 

[deejaycee_2000]

Re: Suzuki 65hp, engine cutting out

Yes on your tach there should be lights showing if there is a problem, well if your tach is working properly and you are not getting any warnings then the engine is not over heating and there is no oil problems, that only leaves you with your fuel .... normally especially with this model the fuel pump diaphram always gives troubles ... so you need to have a look at that and replace it and then see if your problem still persists .....

 

[paulmuzzer1]

Re: Suzuki 65hp, engine cutting out

Thank you for your help,<br /><br />I dont have a tach or any intsruments of any kind so i purley depend on audible sounds. what type of instruments would you recomend me getting and which ones do i buy that will fit my Suzuki 65hp.

 

[deejaycee_2000]

Re: Suzuki 65hp, engine cutting out

mmmm ..... what year model is your engine? To be honest with you I also don't have any working tach on my boat, I have an 1985 model 65hp, my boat sank a couple of years ago and it had the same problem as yours aferwards ... I replaced the fuel pump diaphram, all the sensors and the oil level switch in the onboard oil tank and it was perfect after that, as long as you check your engine every now and then to make sure it is not overheating it should be fine ... if you don't know what year model you have, post your serial number here and I will tell you ....

 

[paulmuzzer1]

Re: Suzuki 65hp, engine cutting out

That is very kind of you to do that, the only problem is that my boat is in Conwy and i am in Warrington which is about 60 miles 96kms away so wont have the information till probably the weekend.<br /><br />you seem to know this type of engine, is there anything that i should be looking for on these engines, what are they like?? fuel econemy etc,etc

 

[deejaycee_2000]

Re: Suzuki 65hp, engine cutting out

Oh I see ... yep I know this engine very well ... well it is a great engine, and when they run, they run well, these engines were made very strong and durable and mine have givin me good service over the years, great for skiing. Very fuel economic compaired to my 115hp suzuki. Lets just say i'd rather go out skiing for the day with the 65hp speedboat than the 115hp one, fuel cost is about a third of what I will spend on my 115hp if you get my point. If you treat your engine well it will treat you well.

 

[bossee]

Re: Suzuki 65hp, engine cutting out

Hi,<br />Probably fuel pump (the rubber diaphgram set). Also check all fuel lines and the fuel bulb.<br />Make sure you use correct spark plugs with correct gap also. <br /><br />brownspoint.com has Parts Look-Up if you need to check various parts and where thay are located on the outboard.<br /><br />It is also good to know if the thermostat is working. But be very careful when removing the thermostat cover, the bolts break rather easy.<br />Check the thermostat in a pan with hot water on stove. Hang the thermostat in a thin wire and make sure it open at specified temp. If you remove the thermostat write down how it is mounted so you can mount it back insame position.<br /><br />Impeller (water pump, rubber wheel) is an important thing to make sure it is not to old. Should be changed every 2-3 year or so.<br /><br />If You post the serial nr I can tell You the Year of your DT65 if you do not know that.<br /><br />Tachometer is the most important instrument since without it you do not know if you reach optimal RPM at WOT (Wide Open Throttle). Maybe Your outboard is close to over rev or maybe it is under rev. Could be perfect also but You do not know for sure until you get a tachometer. DT65 should at WOT have RPM around 5500 I belive. You can change prop if needed, rule of thump: one inch change in pitch change RPM about 150-200 rpm.<br /><br />I had myself a Suzuki DT65 (1991), I sold it in 2003. I have Yamaha F115 now.

 

[Tarrif2]

Re: Suzuki 65hp, engine cutting out

Thanks for the information, it is kind of you to take time to wirte your thoughts on my problem. with me not being mechanically minded i am going to book it into a Suzuki main agent and get them to look at it, i would still like to hear any other thoughts for future ref.<br /><br />Kind regards<br /><br />Paul

 

[Tarrif2]

Re: Suzuki 65hp, engine cutting out

Update,<br /><br />I have got my boat and engine in ****ies of Bangor, i have just called them to see if they had any information on their findings, <br /><br />they have told me that they cannot find anything wrong with the engine and all is well.<br /><br />So....where do i go from here? i am in your hands as i have not got a clue, i thought that if i put the engine in a Suzuki dealer then they would know about the problems and sort it out, how wrong was i.<br /><br />Anyone got any ideas as the last thing i would want to do is go out on the water and keep breaking down.<br /><br />Thanks

 

[bossee]

Re: Suzuki 65hp, engine cutting out

Hi,<br />Did the Suzuki Dealer actually try the boat and outboard in the water, in sea? At various RPM's including WOT?<br />They should do that, preferably with You onboard so a) You can see with your own eyes that they atually test it in the water, b) You can see if it will run fine or behave like it did before.<br />Based on what the sea trail result will be You can then decide what action to take.<br /><br />It is very easy to start replace parts and and chance it is this or that cause and therefore this and that part(s) should be replaced.<br /><br />But the fuel pump (rubber diaphram set) is a suspected thing in this case.<br /><br />I would probably have the carburators cleaned and carb kit installed. Then new fuel pump.<br />Then make sure fuel bulb and fuel lines are fine, and use fresh gas only.<br />If You use a built in tank try a working external tank instead to eliminate any tank problem. I would also invest in new spark plugs (NGK B8HS-10 with gap 0.8-0.9 mm/0.31-0.35 in)<br /><br />The cost for parts for carb kit for 3 carburators, new fuelpump and 3 sparkplugs you can see at www.brownspoint.com<br />$22 x 3 (carb kit for DT65)<br />$14 (fuel pump)<br />$2.5 x 3 (spark plugs)<br /><br />The labor cost for that can not be that much.<br /><br />Above is what new parts and money I would throw at it to start with just to rule out the most obvious. Then if it still not work you have at least eliminated 2 common fuel delivery problems.

 

[deejaycee_2000]

Re: Suzuki 65hp, engine cutting out

Too save alot of $$$, first replace your fuel pump diaphram, because all these 65hp suzuki have a problem with these for some strainge reason, if the problem persist after the change well take it from there ... I had the same problem with one of my brother's kids boat (5hp mariner) could just not find the problem, after a while we figured out that he sits on the fuel line when he drives the boat, so it uses enough fuel to run for a while bit then dies when it runs out and then when he gets up to try and pull start it again fuel will have run through the fuel line again to the engine for another run ... and so it carries on ... so sometimes it could be the simplest things that people don't think bout ... just thought I had to share that ...