2.4 merc 3 dead cylinders

[skipe]

Hi, I have a problem on the left bank, cylinders 2-4-6 of a 1988 merc bass motor. it has spark fuel and 115 psi compression on all cylinders. the problem started suddenly, motored out with normal performance, sat 1/2 hr. restarted engine and had problem. two weeks prior I hit a log with the prop but the engine ran fine the subsequent two weekends. is it possible to have broken something to knock out only 3 cylinders and still have spark fuel and compression? thanks for any help, Skip

[dynobo]

If your timing is correct on 2,4,6, then what would make you think they are dead. Two strokes are pretty simple machines. sufficient compression, correct air/fuel, and exact spark:timing and she runs. So what is different about 2,4,6 than 1,3,5,?? :confused:

[dynobo]

Swap your switch boxes and see if problem moves to other side.

[Jay Smith]

Had a 2.5 EFI with the same issue and it was dead on the port side too it was stator or trigger . It wasn't the switch boxes as they were traded out for new ones by me a day eariler at the customers request....

Good luck,

[Propster]

Mine had an intermttiant miss, loss of power and fouled plugs on 1-3-5. Turned out to be a loose ground on one of the switchboxes.

[skipe]

is there any way to test the stator and trigger assemblies with a fluke meter or other test equipment? Skip

[kingsbiship]

Easy things first... Dynobo hit it! Do the switch, It'll cost ya nothing and
will tell ya what to do next! Those three plugs mite be fouled now also!

[skipe]

Thanks to everyone for the info. I haven't been able to check anything yet but will post results when I do. Again Thanks. Skip

[Raceman]

Generally if it's 3 cyls it's a switchbox or stator, if it's two cyls it's a trigger, one cyl switchbox or coil. 3 cyls or 1 can be some type of wiring issue also. (assuming carb motor)

My drag on the yellow boat dropped 2 and it was the ECU.