mercury 2cylinder 40hp 1997 starts but wont run...need help !!

[timmybuddhadude]

Re: mercury 2cylinder 40hp 1997 starts but wont run...need help !!

Gerry !!

So it's okay to see that spark/flame?
If i get a new hose/barb on there the spark flame wont melt the hose or travel down the FP diaphram and cause damage?
You are totally brilliant

So the flame is normal?? It looked a bit freaky to me... the flame comes out....

T

..and how will the 'flame' become a 'spark' with that hose and barb connected properly..the pulse line.wouldnt the same power come out/in

& how does no pulse line effect its performance ...what does it do except for power the FP

I am a bit 'freaked out' at this stage that the flames from hole wont go down and set alight to the fuel pump
I really need you to say no they wont and all is okay to order and attach the barb because if that flame goes down to all of that fuel that won't be good.

Is the barb fitting a one way suck type thing valve because it seems to me the barb fitting goes at the top where the flame is...


if you say its normal..and i just need cooling system..this hose and barb..and then in the end the stop switch I am going to be really happy

 

[carholme]

Re: mercury 2cylinder 40hp 1997 starts but wont run...need help !!

The positioning of the various ports and the pulse line are such that when the piston is moving up and down in the cylinder, you will have no worry about flame entering the fuel pump. Rather than going into a detailed explanation of how the engine works, here is a link to a pretty good idea of the workings of the fuel pump, which might reassure you:

http://wiki.bssd.org/index.php/Diaphragm_Fuel_Pumps

Gerry

 

[timmybuddhadude]

Re: mercury 2cylinder 40hp 1997 starts but wont run...need help !!

Okay ! Thanks .well thats a relief
And this could be the route of the problem...
allthough i am confused s to why continuously pumping the bulb didnt work
and to why if this is attached the hose does not melt...

here is an attached pic of the problem
i will attach the hose tomorrow with a clip if you say that is all good until a barb is ordered(Easter etc)
thanks Gerry

Happy Easter

 

[carholme]

Re: mercury 2cylinder 40hp 1997 starts but wont run...need help !!

Don't know what type of clip you are referring to for attaching the hose but whatever it is, the connection has to be airtight if you want the system to work as advertised.

Gerry

 

[tyst67]

Re: mercury 2cylinder 40hp 1997 starts but wont run...need help !!

I'd say broken reeds

 

[timmybuddhadude]

Re: mercury 2cylinder 40hp 1997 starts but wont run...need help !!

okay..and thanks for input tyst67 .. i suspect broken reed too..
Gerry I attached the 'pulse line' hose today got a totally the same replacement with same fitting from an abandoned motor. It seem the hose has metal in the end has has long nozzle on fitting hence didnt melt hose from intake
It is all airtight..and yes it did run better..although i suspect it's much the same as just pumping a bulb

But it still crashes..so that is not the problem
This leaves reeds or cdi unit
What do you think from here? Both diagnosis on troubleshooting seem to have the same symptoms

Timing seems more or less ok from pistons tdc etc

so what do you think?
No no telltale so i am reading on how to troubleshoot the water pump/lines and thermo

what on earth do you think is wrong with this? Ordering a cdi will be easy and some places take them back if thats not the problem...
Reeds? Have never done those before
I really hoped today would be the day with all problems solved with that pulse hose ......

T

 

[carholme]

Re: mercury 2cylinder 40hp 1997 starts but wont run...need help !!

I don't know what the basis is for suspecting reeds or the CDM. All you say is that the engine crashes. What does that mean?
Does the engine start and idle OK? Can you shift into gear and advance the throttle?

If it does, have you done the cooling system inspection to see why you are not getting anything out the telltale. You should ensure this is repaired before running the engine.

Does the bulb firm up when you pump it?

Did you do the fuel flow pulse test by removing the line at the carb and cranking the engine?

Did you pull the thermostat cover to see if there is a thermo installed in yours? There may not be one as you had said before that your telltales were immediate.

Have you ever done a compression test on this engine and if so, what were the results?

Gerry

 

[timmybuddhadude]

Re: mercury 2cylinder 40hp 1997 starts but wont run...need help !!

i don't know what the basis is for suspecting reeds or the cdm. All you say is that the engine crashes. What does that mean?

Hi..i starts runs then goes clunk stops and kind of backfires. cdi not cdm coilsx2. This is the box with pic attached I think ...According to goodle a failed''cdi'' has those symptoms..

does the engine start and idle ok? Can you shift into gear and advance the throttle?
Yes i can but its v v temperamental it does both gears and likes load

if it does, have you done the cooling system inspection to see why you are not getting anything out the telltale. You should ensure this is repaired before running the engine.
Have started to take off the very bottom prop needed a bigger wrench size..had to stop.am onto this now (and thermo in upper case(replaced the rubber there too by the way the shop said it squirted water out of there so am sure it goes there it had a hole(near the gasket)))

does the bulb firm up when you pump it?
Yes and no fuel leaks

did you do the fuel flow pulse test by removing the line at the carb and cranking the engine?
Yes ..it squirts out

did you pull the thermostat cover to see if there is a thermo installed in yours? There may not be one as you had said before that your telltales were immediate.
Not yet but will be doing that very soon i did open it last week to replace rubber ; so i guess the answer is yes??

have you ever done a compression test on this engine and if so, what were the results?
Dont know the results shop dealer did test last week they said it was all good cant book it in for a longer period so its up to me..they are fully booked(and would be costly etc the amount of time i have spent on it!!)

gerry

thanks gerry.will work on it again tomorrow

nb...r.e thermo...when the shop started it and tested compression cleaned carb originally when bought they said it was p***ing water from the thermo hole..tiny hole by thermo. i opened it up we discovered it had a broken diaphram causing this...which was replaced. didnt replace the gasket however it looked ok..the water peeing through that hole stopped...
I am on the understanding that the tell tale comes through back of lower cowling hose that was blocked
If it pee'd water though there through the thermo diaphram hole then i guess water is circulating but no tell tale where it should be? so prob no need to do the water pump check by pump......pleeeeease correct me if i am wrong !!!

 

[carholme]

Re: mercury 2cylinder 40hp 1997 starts but wont run...need help !!

I'm sorry, I cannot tell you what you want to hear. There may be water flowing and cooling but you have no visual indication of this happening and you have no idea of the engine temperature. As well, you probably do not have a water pressure gauge up front, and without the telltale flow, you can burn that engine up very quickly.

Gerry

 

[timmybuddhadude]

Re: mercury 2cylinder 40hp 1997 starts but wont run...need help !!

This engine was such a mess it seems.. so all i can do now is correct the tell tale
Then order a cdi..if that is not it they will take it back..
if its not the cdi i have to do/learn how to do the reeds...
....
and...

 

[timmybuddhadude]

Re: mercury 2cylinder 40hp 1997 starts but wont run...need help !!

Blew alot of water up the intake for tell tale and into where the thermo is with replaced diaphram! I now have a tell..tale.. so all clear...!
This leaves the tpm/cdi with picture before or reeds...reeds are accessible apparently just behind the carbs and i found a mechanic who can do it in an hour... so thats good news for them..

 

[timmybuddhadude]

Re: mercury 2cylinder 40hp 1997 starts but wont run...need help !!

I missed this bid!... 1997 Mercury Outboard Complete Ignition System Stotor Switch BOX Coil AND More | eBay
does anyone know what that box is exactly? please tell me its not a tdm..timing protection module
how can i test that without having to buy one 450$

Garry according to 2a in the manual electric p 23 the tpm timing protection module is working correctly if when it accelerated sparks quicken & when deselerated throttle sparks lessen. Theres no way on there to test the ohms..
Even then i have to figure out how to test ohms properly!
But every other item i think you can do an ohms test so it seems i have to work out how to test all of those
But this is possible(also in 2a)...
'' 5. Timing will not Advance on 1 Cylinder Check wiring between CDM and TPM. If wiring is
OK, replace CDM. ''
the cdms have to be placed as they are..they dont get the current and fire if they are the other way around..i dont know if that is normal

but it doesnt necessarily''cut out''at high rpms

There isnt anything else',missing' on the machine now.. i am soo stuck but it must be an electronic diagnosis or reeds
I have to figure out how to test ohms

Tomorrows mission is to tackle the ''reeds'.. i heard they're easy to reach on here and just behind the carb.. if its not# the reeds then..well... it has to be the electrics and ohms test
I will do what i found with help on google first find reed symptoms then crack it all open
I found this on a forum...
'' We have found a very high incidence of chipped and broken reeds in Mercury motors equipped with rubber coated reed cages,which came in to use in 1996,and are still in use.''

thanks again..reeds next check after that there can only be one ''very bad'' alternative! as far as i see

Tim

NB !..one spark plug allways seems ''wetter'' than the other .....

 

[timmybuddhadude]

Re: mercury 2cylinder 40hp 1997 starts but wont run...need help !!

i checked the reeds..reeds are fine
no chippings etc
priob not yet solved..

checked needle in float
float was a bit not flat in carb got readjusted
just about to give it a run after that
runs alot better with adjusted float that was bent
finally got a booking with mercury tomorrow!.
tomorrow may be the day hay

 

[timmybuddhadude]

Re: mercury 2cylinder 40hp 1997 starts but wont run...need help !!

it was /is officially the ''tpm''..i didnt have the multimeter to check it.was the suspicion in the first place
Thanks to the guys at mercury for sorting it all out @last ! much appeciated
and thankyou Gerry etc for your input
will order the part and write again when it is working
went through absolutely everything3 else on this engine..hopeing it wasnt that
it is
T

 

[timmybuddhadude]

Done !

Done !

all good now was a TPM for two hundred dollars....

x

(had intermittant spark one cylinder...)