1988 Force 50

[gwiller]

Model# 507y8c<br />Serial# 1199<br /><br />Motor turns over and has good spark and fuel flow. It turns over 3 to 4 times and then backfires and shoots a 2' flame out the exaust port. Is this a timing problem and if so, how do I set it.<br /><br />Thanks<br />I have never had this motor in the water, but it is possible. The prop looks a little rough but not like it hit somthing hard. I will check the key.

 

[eurolarva]

Re: 1988 Force 50

Sounds like a busted flywheel key. Did you hit something when you last ran the motor?

 

[gwiller]

Re: 1988 Force 50

Nope, That ain't it!

 

[eurolarva]

Re: 1988 Force 50

Manual says it could be one of the following<br /><br />Cracked spark plug insulator<br />Carbon path in distributer cap<br />Improper timing<br />Crossed spark plug wires

 

[gwiller]

Re: 1988 Force 50

Ok, One more ?. I don't see anything that even looks like a distrbutor cap.<br /><br />Hehe , I am not a super mechanic but I think positive thoughts while I try to be. <br /><br />(I did raise a 57' Evinrude Lark from the dead once)

 

[eurolarva]

Re: 1988 Force 50

Pretty sure you dont have a distributer. Sorry about that I was just quoting the manual

 

[12Footer]

Re: 1988 Force 50

Dont have a distrib...Before goinmg any futher, try switching the plug wires.<br />You may have inadvertantly transposed them, or a nighborhood kid may havbe decided to drive you crazy. <br /><br />If they are one the right plugs, the two pulse leads, (one going to each of the coils) are backwards. These connectors aree usually behind the bracket,between the coils --- gotta pull the entire bracket to get at them.<br />If all looks 'by the book' ,pull the flywheel, and inspect the flywheel key/groove, as sugjested earlier by Eurolarva.And where he refers to 'distributor', just replace with cd pack/trigger. While you're in there, check the trigger, and the wires comming out of it. Did you remove any of these wires? If so, maybee you have them reversed

 

[tinbender2u]

Re: 1988 Force 50

was running fine then new plugs now backfires sounds like plug wires switched