den001

thanks for that mate but they are both missing. i just hope that the water pump kit being sent 2morro is the right part as i couldnt give him a model number

it has undergone a full rebuild so im assuming that the welsh plugs were removed due to that. i have the serial number on my rego papers but i do not have the model number

well got it out on the water and as we all know when a mechainc is present the problems do not arise, gladly this was not the case.... got it out on the water and the mechanic make some adjustments to the throttle linkages and a very slight timing adjustment and it runs alot smoother and responds to throttle very very well, luckily he has told me that it has had a recent rebuild as he could tell from the way the engine looked, responded and power it produced.. he seems to think it is a 115hp as he thinks that a 90hp would not go like mine does, the previous owner told me it was a 115 but i saw the tag on the carby and it says 90hp, there is no model number as during the rebuild someone had replaced the welsh plug that its usually stamped on.... starting warm after sitting for a while still was a issue and he is convinced that it is actually my control box as there is ALOT of play in my throttle lever....he susgested that after sitting for a while that it would start first go if throttle was applied, he showed me that if i gave it more throttle that my lever was allowing using the engine linkages it fired up first go and when reduced to normal idle it was perfect. i towed it home and just finished fiddling with it and it seems that inside the control box, there is no adjustment inside so i had a play with the cable myself on the engine side, i tightened up all moving parts inside the control box and there is alot less free play now but i am still convinced that the box is the culprit... im pretty sure that on other boats if you rev the motor via the throttle leaver you can get a very high idle, mine is not the case, it barley moves the throttle, if it could move more it would act like a normal boat. i have got the motor to start MUCH easier using the adjusted throttle leaver, it has more revs than it had before fully open and when dropped it returns to normal idle... i will be testing it on saturday when i go fishing.... another problem arose whilst i was playing with the motor on the muffs, the overheat buzzer in the controller turned on while idling for around 5 mins. i rang the mechanic and he says that it was peeing water well on the river, he seems to think its the muffs, and water pressure, as it takes around 25 seconds for water to come out the tel tale. but it comes out cold compared to the exhaust... ive ordered a new water pump kit for reassurance and i will change it tomorrow.... but so far so good and im pleased that its not any costly drama, will have a proper test while fishing on sat all day...

im pretty sure that the carbies dont have any screws for adjustment. but i could be wrong. i took off the top plate of the top carby and it looks like there are 3 small brass fittings in there, im not sure if these are the jets but if they are i think it would be a very easy carby kit overhaul... but i will defiantly find out tomorrow.. i have read in the manual that a faulty fuel pump can cause hard starting and can act like a misfire during low speed operation as the diaphragms are not functioning correctly due to fuel pulses not reacing the carby, it makes the symptoms of the problem look like a ignition problem and when throttle is applied it returns to operating normally which mine does... i have also read in the manual that if throttle is applied and there is a loss of power for a small period of time and then it takes off, that it is a blocked main jet issue and that it should be cleaned.... considering i havnt got a wire mesh inside my fuel pump i am leaning towards blocked carbies/fuel pump. but i have read alot of the manual and there are many small issues that can cause these types of symptoms, but the above matches mine closest to whats in the manual so i really hope it gets sorted tomorrow. im goin fishing on the weekend if its sorted or not!

ill give it a go tomorrow, thanks mate. im hitting the water with a outboard mechanic so he can diagnose the problem... cheers

thanks for that info mate, but i really think my problem lies within one of the systems, it is biend started as per thoes details.... it is not a problem starting it when it is cold.... its more of a problem that when its started cold and i give it throttle to build revs it is really really slow to respond and it will rev up with issues stated in my first post.. secondly, when its warm, it starts but its not ideling right and i must give it revs for at least 20 seconds so it will come up to a normal idle so i can drop the throttle and put it in gear and take off.

thanks for your replys.... no i havent checked the comp yet but will be doing so tomorrow... i checked the plugs yesterday arvo, went fishing on sunday and flushed the motor on idle for close to 10 mins on sunday, the plugs are not clean from water and they are a wettish brown/black colour.... i really think the carby is clogged somwhere or the fuel pump is gone as it doesnt run a fuel filter inner metal mesh for some stupid reason (purchased like this)

Yeah I know it has choke on the key, it is used when it is cold but I think it should not be needed when the engine is warm

also forgot to mention, the other day i took the boat out and was cruizing along, i increased the revs to 3/4 and it responded well, then i increased the revs to wot, and nothing happened, felt like it was loosing power, it kept going for about 5 seconds like that and then took off to wot....

Hi, im new to the forum and nave recently bought a 17ft fishing boat with a evinrude v4 86 model 90hp i am very mechanically minded but am new to outboard engines.... have a few questions re my engine. here are the symptoms it cranks and starts fine most of the time, but somtimes when it kicks over it will idle really roujgh and i have to give it heaps of idle which is very delayed in rpm, once it picks up its idle its good and stays on... once warmed up it runs slightly rough while trolling i can see the engine shaking slightly. but when i give it heaps of throttle, 3/4 to wot it runs absolutly perfect and actually goes pretty quick (65km/h). once i stop for a fish and go to start it again, it needs the revs again and it starts very rough and takes about 15 to 20 seconds for the revs to reach a high smooth idle, within this 15-20 seconds i have no chance of it moving as it sounds like its flooded and it splutters and gurgles and will just stall when put into gear, after its reached a high smooth idle i can drop it down to a normal idle and take off again, like nothing has ever happened... ive sort of ruled out ignition system as if it was i would suspect a problem in the upper revs of the engine which it does not have at all.... i have fresh fuel, new plugs and have cleaned the carbies with spray only (not disassembled) the plugs were checked today and they are a brown colour with very slight blackness. also when i prime the bulb up it sort of slightly deflates after say 7 mins... also the vro system has been removed and some bodgey bloke used cable ties for tightening the fuel line ends to the dedicated positions. when the bulb is primed hard and i keep priming there is very slight seeping on the ends of the hoses.... im going out on wends to test it and i will try priming the bulb when it runs roughly and see what it does.... any help would be greatly appreciated as its doing my head in. i think it could possibly be a air leak somewhere which is causing the pressure to drop in the fuel line as its starting up and having to resuck/pressureize the fuel up again, also noticed that the fuel filter/pump had no metal gauze in it and the rubber gasket inside may be deteriorating, did not check the diaphrams.. any thoughts?? regards denis