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OMCC 05-31-2015 06:28 AM

Quote:

Originally Posted by TopCatGr58 (Post 464503)

The crankcase and Engine oil are the same thing...the engine and the shaft the pistons are on is the crankSHAFT, and therefore the case it's housed in is the CrankCASE...Engine Case, etc. IT can be difficult to check it for the presence of gas contamination without draining it. You can try to smell it thru the filler spout, or you can stick a wooden or clean metal stick into it, get some oil on it and then smell it again to see if you can detect any fuel smell vs., just oil. If you are sure that your carbs haven't leaked into the engine because you took them off, that's one thing, but if you're not sure, then it's recommended to go ahead and drain and replace....ONCE you have fixed the carbs so you won't have to do it again. It takes very little fuel to contaminate the oil enough to cause it to damage crank/piston con rod bearings and such!

thanks I will look into this!

Quote:

Originally Posted by TopCatGr58 (Post 464503)
The Ignition vacuum advance is under the left engine cover....the hose connects to the vac. pot and then comes out behind that cover and up to the carbs where it attaches to the #2 carb body brass port because it's a METERED port, that's why you don't want it on the Intake Boot synch port.

The intake boots can look bad bad on the outside, but still be okay on the inside because they are double walled. The mating surface can get messed up from age/heat, rubber gets brittle and crumbles off. After inspecting the inside for cracks, if clear, then you can use some gaskets and sealant to ensure that they don't have any vacuum leaks.
T.C.

I think the vacuum leak was the ignition vacuum not plugged in once I plugged it the engine seemed to idle much smoother.

Thanks TC!

LoHo 05-31-2015 11:45 AM

The carb boots may also look great and be leaking at the gasket mating surface. I ignored doing the starter spray check for years and recently found that two of my boots were missing chunks of gasket and leaking vacuum badly, ruining any other calibrations I was doing.

OMCC 06-13-2015 08:37 AM

Quote:

Originally Posted by LoHo (Post 464583)
The carb boots may also look great and be leaking at the gasket mating surface. I ignored doing the starter spray check for years and recently found that two of my boots were missing chunks of gasket and leaking vacuum badly, ruining any other calibrations I was doing.

Did this no leaks found!
Thanks!


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