Float Bowl Gaskets for 912

[skippydiesel]

As well as looking for new spark plug caps,I have been researching float bowl/chamber gaskets (have a small weep);

 

Rotax seems to have combined the two (912/914) numbers they were using into one, so now PN 830721 is the way to go. I get the impression this is a "rubber"  no longer a cork gasket.

 

I have contacted variose suppliers (mainly USA) and Bing the maker of the (Bing model 64, Part No 830-727) carburettor

 

Prices/ gasket so far;

 

Rubber

 

B Flood $22.99  + delivery

 

Bing $17.74 delivered 

 

Cork

 

EBay $58.19 for 10 = 5.89 each  including delivery - up from here

 

 

[Blueadventures]

I've got two (nitrile) on the way as spares (should get in todatys mail); in case I damage one in the field or at home airfield; or a mate may need one.  I had a set of nitrile ones on an 80hp 912 years ago.  Then one day put some aviation soft seal #3 on the upper side to hold it in the groove better.  It swelled and became us so don't try that.

 

Need a die cutter maker to make a cutter to pop them out of sheet cork.  These days a 3D printer could make a cookie cutter the correct shape in hard plastic material. (That's an isea for a forum person) I was going to hand cut two emergancy spares buy better to buy them outright.  I enjoy repairing things for some stupid reason.

 

Cheers

 

Cheers

 

 

[skippydiesel]

Ho Blue,

 

We have very similar philosophies/drivers - I would not hesitate to try an cut a gasket for a land bound carbi but somehow trying to do the same for an aircraft system puts me off.

 

Just thought it might help other 912/914 drivers out there to get the results of my research.

 

 

[skippydiesel]

Received my brand new "rubber" gaskets from Bing today - had some time on hand, so did the install immediately - strange! both float bowl cork gaskets were damaged. Only installed them 100 hrs ago. One had actually split along a long edge, the other twisted slightly. The twisted one was weeping. I am usually very careful with my install but obviously not careful enough last time. 

 

 

[Downunder]

It's not difficult to get them slightly out of alignment when fitting, and pinch them.

 

This happened to me and it leaked slightly after checking the fuel bowls during a service.

 

I purchased new cork gaskets, removed carbs from engine and sat them upside down on a bench.

 

I put a VERY small amout of silicone (or something) in each corner and fitted gasket and bowl.

 

Left overnight and refitted to engine. That was several years ago and I've never had a problem since.....gasket sits nicely in place when removing bowls.

 

 

[skippydiesel]

Thanks Downunder - I have been in the habit of replacing my cork gaskets every 200 hrs. Never had a problem in the past - old gaskets always looked like I could use them again but not this time and at only 100 hrs.

 

The new jobs look the goods. It may be illusory but they look & feel much more substantial than the cork.