Force 85 - tuning issue?

[Craig cK]

Hey guys!<br /><br />Thanks to your help she's now running like a beast! Fuel pump diaphragm must have been the issue! Although I spent most of my short sea trial today airborne! (air trial!?!?)<br /><br />Coming back in she will not tick over and if you drop the revs right down and then give her a hand full she gives a cough, cough, spluter, stop! - poor thing!<br /><br />What do you recon now? Would that be tuning? I have put a glass spark plug in two of the cylinders and the colour seen is a nice blue colour. <br /><br />Any clues?<br /><br />What about that diaphragm again? It didn't look right when I put it together - it was kinda crumpled at the edges, but I assumed that would pull up with the screws?<br /><br />All help as per usual very much appreciated!

 

[roscoe]

Re: Force 85 - tuning issue?

I would look at the carbs.<br />Well, looking at them won't really help, you will likely need to tear them down and clean them out.<br /><br />Try running it and right before it is starting to die, hit the choke.<br />If this helps, you are likely running a bit lean, could be from clogged carbs.

 

[Craig cK]

Re: Force 85 - tuning issue?

Well I cleaned out the sediment bowls, the big jets looked HUGE! so I considered them not blocked!<br />I would have a go at tuning them; but the glass spark plug would suggest that they are burning correctly already.<br />I'll try the choke thing on my next outing this weekend and let you know!<br /><br />Thanks for the help so far!

 

[Craig cK]

Re: Force 85 - tuning issue?

Ok...well here is the latest.....<br />We stripped the carbs, but that made no odds.<br />RE-built the fuel pump (again) and then it was well duff (again)....so there was a coincidence that every time we re-built the fuel pump it would make or break the engine.<br />Pulled the various plugs and found No.2 was not sparking again. <br />So we swapped the coils and found that didn't help....next we swapped the power packs and that may have done it??? we had bright sparks....<br />HAD being the operative word....the bendix rubber bush is now screwed...so it's time to order some new parts before we can try again!<br /><br />fingers crossed!<br /><br />Told you I'd keep you informed!<br /><br />Off to 'search' the forum about this bendix issue now!