johnson 225 shimmy's, shake's, sputter's and dies. :::UPDATE:::

[phatmanmike]

1991 johnson 225 v6. <br /><br />replaced fuel lines, rebuilt carbs,new head gaskets, re-glued flywheel magnets, new plugs, new thermostats.<br /><br />compression is 130 in all 6 . strong hot spark in all 6.<br /><br />at boat ramp in water: motor starts right up and spits and coughs and shakes and after it finishes quick start mode, it dies instantly. when it coughs and sputters, white smoke "spits" outa the exhaust.<br /><br />i removed the reeds and held them up to a light and they all looked good, no outa shape or bent reeds. but i DID notice the backside(inner)had some white burn marks, as though the engine has been backfiring before, and maybe burnt the reeds.<br /><br />it seems as if the motor is misfiring VERY BADLY , almost like the timing is WAY WAY OFF.<br /><br />motor did this when i bought it 4 weeks ago, and after new fuel and new parts and service, it still does this.<br /><br />any ideas where i should start to look for possible prob?<br /><br /><br />:::UPDATE::: <br /><br /> my manual stated that the problem could be either the coils were hooked up wrong, flywheel has broken the key, or the powerpack needed replaced. flywheel is good, coils are correct, so i replaced powerpack( 160 dollars) and still same thing! HELP

 

[Dhadley]

Re: johnson 225 shimmy's, shake's, sputter's and dies. :::UPDATE:::

Most times they idle at about 1100 - 1200 (out of Quick Start) on the flushette to get to 900 in neutral in the water. More if the motor sits real deep in the water.

 

[Basscat 1]

Re: johnson 225 shimmy's, shake's, sputter's and dies. :::UPDATE:::

I am sure you checked, but are all the carbs in synch with butterflies in the shut position at idle?

 

[Walker]

Re: johnson 225 shimmy's, shake's, sputter's and dies. :::UPDATE:::

Check the recirculation valves.

 

[phatmanmike]

Re: johnson 225 shimmy's, shake's, sputter's and dies. :::UPDATE:::

Check the recirculation valves

where are they, and what do they do. also, what am i "checking" them to do or not do?

 

[phatmanmike]

Re: johnson 225 shimmy's, shake's, sputter's and dies. :::UPDATE:::

update: see above/origonal post. up there

 

[Walker]

Re: johnson 225 shimmy's, shake's, sputter's and dies. :::UPDATE:::

Your manual should identify the recirculation valves and also tell you how and what to test them for. Ther are 6. Look for small hoses running from the cylinders to the intake manifold. 3 on each side. the valves are where the hoses attach to the intake manifold.