89 200 hp Johnson Need some help!!!

[Leonard Ray]

I have a 89 200 hp Johnson, start OK runs great four about 15 seconds then no speak on #1 and #2 cylinders .Any ideas where to start?

 

[boobie]

As a guess with out any trouble shooting done, a bad power pack.

 

[Faztbullet]

I would say timer base.....

 

[Leonard Ray]

Any way to check these? Thanks guys

 

[Joe Reeves]

The ohm reading should be near identical on all timing sensors of the timer base.

With the no spark situation on #1 & 2 existing... compare the ohm reading of the sensors.

 

[Leonard Ray]

I changed the the power pack today with an old one I had and nothing changed still no spark on #1 and #2.Did the OMS test on the timer base and checked it like the book said to and got no reading from the center white to the center wire on the other side. I think the timer base is bad ?

 

[Joe Reeves]

If I understand you correctly.... no reading on the sensor!.... Then yeah, sounds like a failed timer base... OR a broken wire. Don't overlook that possibility!

 

[Leonard Ray]

Ok thanks I am going to try another volt meter before I do anything when I get home , but yes I am getting nothing on any of the pegs.

 

[Leonard Ray]

I check the timer base with a deffer ant meter and the two center pegs check .221 . It should check 220.0 + or -20 right? I also check the power pack and they all checked within a few number apart.

 

[Leonard Ray]

I also removed the flywheel to check the magnet and the inner one had some rust on it so I cleaned that up and now I have fire on all but #2?

 

[interalian]

I check the timer base with a deffer ant meter and the two center pegs check .221 . It should check 220.0 + or -20 right? I also check the power pack and they all checked within a few number apart.

Make sure your meter is on the right range. .221 may be on the k-ohm range and really be saying your part is OK.

 

[Leonard Ray]

I have check the timer base with two different meters and can get a reading from the two center pegs only and it is .221 OMS. I have check all the other pegs every way possible and do not get any reading! What you guys think, the motor starts and runs but still not fire on #2. Timer base? If he time base was it seems like it would run at all?

 

[Faztbullet]

Rust wont effect firing...

 

[Leonard Ray]

I found a timer base for a 87 200 hp and put it on my 89 200 hp and it fires up and runs, fire on all 6 cylinders.The book says this is the wrong timer base. What is the deference in the timer bases? Runs just don't want to mess something else up.

 

[Joe Reeves]

The 1987 200hp model has two (2) powerpacks... the 1989 200 has one (1).

The 1987 200 timer-base has a part number that DOES NOT supersede up to the 1989 200 timer-base.

This failure of the 1987 part number to supersede up to the 1989 number indicates that perhaps something electronically is different within the 1989 powerpack.... in which case, interchanging the two could lead to unforeseen problems... BUT.........

Knowing that part numbers of electronic items change simply because a new item may contain a different type wire connector, a wire being longer or shorter, a different color or shade of a wire insulation... changes that really have nothing to do with the items electronic function.... this has allowed many mechanics (they call us technicians now) to interchange components (with different part numbers) with complete confidence.

Bottom line... scrutinize those two timer-bases and get out your ruler.

 

[Leonard Ray]

Thanks, The only external deference I can tell is the 87 has a ground that is white and the 89 has a black with white stripe on it.The center and the external check the same. checked with a set of calipers.The plugs are identical.When I first start the engine #1,3,5 cylinders do not fire for about 10 sec. then all cylinders fire great.Took it and put it in the water and seem to do great.What you think?

 

[Joe Reeves]

Thanks, The only external deference I can tell is the 87 has a ground that is white and the 89 has a black with white stripe on it.The center and the external check the same. checked with a set of calipers.The plugs are identical.When I first start the engine #1,3,5 cylinders do not fire for about 10 sec. then all cylinders fire great.Took it and put it in the water and seem to do great.What you think?

Cylinders 1,3,5 momentarily have their spark/ignition interrupted when shifting... a feature incorporated to allow the engine to shift "out" of gear. This feature activates so quickly and for such a limited amount of time that one doesn't normally notice it.

Some rig and engine combinations, "Not All" are impossible to get out of gear without this feature... in which case (my opinion), the feature is not needed in all cases. It depends on the propeller also... I encountered a large Mako in 1988 with new twin 225hp engines using "Raker" propellers. Impossible to get out of gear at an idle when launched, but perfectly normal on a flushette... Had to change propellers.

Since all three (3) cylinders are affected momentarily when starting, it's possible that the shift switch is sticking for some reason. Follow the Black/Yellow & Black wires on the starboard side of the engine forward and down into the shift linkage to find the switch, then disconnect it as a test to see if that corrects the 10 second delay in the 3 cylinders firing.

As far as that timer base working properly even though the numbers do not interchange, do make an effort to check the full spark advance timing while underway at full throttle to make sure it's accurate.

 

[Leonard Ray]

I checked the timing, at an idle it's 10 deg. BTDC. that seems a little high? I did notices if you give it a little throttle when starting it all cylinders are firing great.Unhook the shift linkage switch and it did nothing.

 

[Leonard Ray]

What should the timing be at full throttle ?

 

[Faztbullet]

You lost the quickstart feature and rpm limiting doing this.....I would not run that old base as it could damage pack.