85 hp force backfires when trying to start

[milkman]

i have an 85hp force when trying to start it backfires even shoots fire out of the exhaust.could this be the timing? if so where can i get info on this matter. or could it be something else. motor ran fine last year but when trying this was hard to start so like a dummy i tried some starting fluid and thats when it started backfiring. now everytime i try to start it backfires and shoots fire out of the exhaust is there a easy solution? or where can i get a manual or something on setting the timing on a force<br />on the web.<br />any help on this matter would be a plus.<br />ps. i quit using the starting fluid !!<br /><br />thanks

 

[12Footer]

Re: 85 hp force backfires when trying to start

Glad to hear you quit with the starting fluid (Ouch).<br /> I would decarbon the engine, and then replace the plugs. Without doing those two things first, it will be hard to adjust timing properly. Oh, you COULD set it "by the book", but with mixed results. Besides, it may also be a temporarily-fouled plug causing the backfire, or igniting coke in the exaust chamber.<br />There IS pobably timing issues tho.<br />Also, check the flywheel key to make sure it hasn't sheared or twisted.