88 spl sometimes gets a surge but if i hit a wave it backs down timing arm loose

[toddschubert]

The bushing on the throttle can seems loose. The timing arm moves enough to advance it by hand. Could that bushing allow this to happen? Its a cheap part...just asking.

 

[emdsapmgr]

Re: 88 spl sometimes gets a surge but if i hit a wave it backs down timing arm loose

The shoulder bolt that holds that cam can only be tighted just so far. That special bold does require a washer on both sides of that cam. The inner washer should be a wave washer which should take up normal slack. While you are visually checking, look at the nearby carb roller. The carb roller (432639) has a clearish plastic sleever over the roller when new. That roller skin can deteriorate with age and come off-a fairly common problem with engines this age. The small clearance differences without that roller skin can affect the way the engine runs, idles.

 

[toddschubert]

Re: 88 spl sometimes gets a surge but if i hit a wave it backs down timing arm loose

The cam itself is not loose but the main roller that pushes timing and carbs has a lot of play allowing me to move things a bit by hand like the timing lever. Carb roller seems to be ok. I think I need to reply that main roller.