Evin 8hp idles ok but knocks going higher

[ba_50]

My 1985 motor idels ok but starts knocking or missing at higher throttle settings. I ran sea foam through it and changed the plugs.

A new retainer & link assembly was added and the adjustment screw was adjusted to about where the other one was.

Could this be the problem? It didn't do this before. Thanks.

 

[BoatBuoy]

Re: Evin 8hp idles ok but knocks going higher

"knocking or missing" is a little ambiguous since each of those describe 2 entirely different symptoms. If it's knocking, that's could be a serious internal engine problem. If it's just missing, that's most probably a "tune-up" type issue.

 

[steelespike]

Re: Evin 8hp idles ok but knocks going higher

Knocking:: do you mean the sound of metal parts banging together or the ping sound of a motor out of time?
Retainer and link if it has to do with the ignition it is probably out of time and you will need a manual to adjust it.

 

[ba_50]

Re: Evin 8hp idles ok but knocks going higher

BB & SS,

The motor sounds ok running at fast idle but when reved up it cuts out and wants to die. It is in neutal in a water barrel. When reducing the throttle and reving down, it sounds like a light knocking, but I don't think it is anything serious.

As for the the throttle rod and the mark that lines up with the roller on the cam, and not using a clip and wire to note throttle movement, they seem to work about right.

Does it sound like a timing problem?

 

[steelespike]

Re: Evin 8hp idles ok but knocks going higher

See if it responds to a little choke as you increase the throttle.