Venom 200 lower water seal

[hi salenity]

I have a 1996 Johnson 200 venom that runs great on the garden hose but will not run in the water . Wen on the hose the water runs out between the upper/lower unit . Is this normal or does it have a seal/gasket bad ? If the water pump goes bad would it run on the hose and not in the water ?

 

[stoveguy]

Re: Venom 200 lower water seal

When on a pressurized hose it will force water through those weep holes and yes it is OK. When in a lake or ? the pump should create a suction @ the pick up area and cycle through the motor get warm for about 30 sec. to 1 min. then the thermostats should open and out the pee tube it should flow, if not get that pump replaced ASAP.

Good Luck

 

[k4ubr]

Re: Venom 200 lower water seal

your motor not running in the water has nothing to do with the pump.. i would check compresstion. aslo need some history on the motor, last tune up, was? how old is the fuel?

 

[Benny1963]

Re: Venom 200 lower water seal

run compression test, it may be another prob yes the hose will put water to the motor and the impellar can be bad, if it wont run in tne water you have some other issues check spark on all cyls and run compression test and repost with results before you change your waterpump

 

[hi salenity]

Re: Venom 200 lower water seal

The compression is 110-115 motor cold throttle closed and I already replaced the stater and power pack

 

[jonesg]

Re: Venom 200 lower water seal

actually it doesn't run great on the hose, it runs the same as in the water but without any load. You need some tools, maybe you already have some.

timing light,
compression guage
spark GAP tester.
For less than $70 you will know the condition of the engine.

Gap tester should be set 7/16th's inch gap, if the spark don't jump theres a problem in that coil,wire or other component upstream, but you've done the PP and stator, so its either one of those or the timing sensor.
If all checks out good then its fuel delivery.

 

[hi salenity]

Re: Venom 200 lower water seal

It actualy will not run at all in the water so I was thinking it is not pumping water and may have a sensor that would not let it run

 

[jonesg]

Re: Venom 200 lower water seal

That would be nice but that feature is not on these engines, they will run fine with no water pump and melt pistons in short order.

The overheat sensor in the heads forces the ignition into SLOW mode, 2500rpm max.

You obviously have some cylinders not firing,
just for giggles...

try disconnecting the shift interruptor switch on the starboard side, down low , its coupled to the shifter cable mechanism, follow the wires and unplug them.
Test it like that. If it fires on all cylinders the shift interrupt switch is stuck or shot.

One bank of cylinders shuts down momentarily every time you shift into neutral, but if its stuck/bad you'd lose spark in half the holes.

If its not that then you have to test with a gap tester for good blue spark on each plug wire, don't bother using a sparkplug to test, it doesn't work.
How do the coils look , good?
If you didn't remove coil from the block you cannot tell if the potting is cracked because it happens on the back, really examine them closely and clean the mounting surfaces with sandpaper.

 

[hi salenity]

Re: Venom 200 lower water seal

First I want to say thanks for the help guys !

I think I already tried the shift interrupter switch and if it was bad the boat would sound bad running in the hose correct ?

I haven't taken the coils off and checked for cracks yet but that will be my next thing to check .

I have checked fire with a plug and that showed good but I do not have a gap tester

Ware do I buy a gap tester ?

Thanks again!!!

 

[jonesg]

Re: Venom 200 lower water seal

any auto store, such as autozone or even sears, the gap must be adjustable.
They're cheap and effective.

 

[hi salenity]

Re: Venom 200 lower water seal

OK I did the gap test Today and NO fire at 7/16''
I had to close the gap down to about the regular plug gap to get it to fire .

Now we are getting some ware

Can I test the timing sensor Or should I just replace it and see if that fixes it ?

 

[jonesg]

Re: Venom 200 lower water seal

Again I would remove and check coils, especially the coil grounds , clean everything.

Is spark weak on all cyls?
If some coils are producing strong spark then try swapping them with weak ones , see if the problem follows the coil.

Try disconnecting the rectifier/regulator, if spark returns replace the rect/regulator.

You need the factory manual,....
www.outboardbooks.com

and a peak reading meter to do any coherrant testing of ignition parts beyond basic troubleshooting. $62 is a great price, the CDI price is twice that.
http://cgi.ebay.com/ebaymotors/Mari...Z230353556405QQptZMotorsQ5fAutomotiveQ5fTools

or throw parts at it.

 

[hi salenity]

Re: Venom 200 lower water seal

Yes the spark is low on ALL 6 cyl

I checked the coils last week and I did not see any cracks , I took them off one by one and took them out in the sun to look at them the plastic did not appear to be cracked but the rubber may have Benn cracking a bit

I do have a Johnson service manual but yea without the meter I cant do all the tests I want to do so I need to get one

I am going to try disconnecting the rectifier/regulator next and see if that helps

Thanks again

 

[hi salenity]

Re: Venom 200 lower water seal

So if I have spark on all 6 but it is weak spark , and I have replaced the stater/power pack what else could it be ?

Timer base ?
Optical sensor ?

Anything I am missing ?

 

[daselbee]

Re: Venom 200 lower water seal

Sure sounds like jonesg is right...grounds somwwhere.
Did you connect that black pigtail ground to the PP back up to a known good ground? It normally connects to the rear stud that holds the PP down...maybe try to move it down to the starboard upper coil bolt for a different place to GND it.
You do not have an optical sensor.
I would look at the ground of the stator...make sure that the mounting posts of the stator are clean and make a good GND connection thru the bolts...

 

[daselbee]

Re: Venom 200 lower water seal

You sure you didn't pinch a wire under the pack when replacing it?
It is awful tight under there. That voltage ( 175v ) from the stator charge coils is not being passed to the pack somehow.