Number 2 - there has to be an easier way to get these through

And finally

OK. Some more info cause I am convinced that it IS something to do with this needle valve jobby. If I attatch a pipe to the fuel inlet and start to blow with the needle closed I just end up with a blue face. No air escaping. If I turn the needle 1/4 turn, I can just make out the sound of air starting to escape, Oh, and a blue face. If I turn it one full turn, no blue in the face and air escaping quite happily. Easier still after 2 turns and can hardly tell the difference from there on out?

The more I look at this carby the more I really do feel sorry for it. If only there was a carby heaven somewhere. It looks to have taken more hits than Mike Tyson.

Martin

That needle isn't out of a 7B.....it's more of the 7L
type....which would make it a later model, a .61FSR,
and the 7B has a 13.5 mm mounting flange....the 7L
a 15 mm flange....

Show me the carb....

Here's the 7B type....

Here's the 7L type....

....but you have the 7B type nozzle....

....but this is the 7B nozzle, like yours....

....but the nozzle in the 7L carb....which matches
your needle...is different....

....therein may be the problem....

see the bottom of your 7B in post #27,,,,
....and the bottom of my 7B in post #32....

....same, same...but you have a different needle....
....so I think either you have some type of a hybred
carb....or someone played mix-and-match with the
needle/nozzle set-ups....and it ain't working to swifty !

If you adjust your carb in the following manner...
....it will never need adjustment again....
(Strip out any parts that look halfway decent)

1. Place the carb on the anvil area of your vise.
2. Get a #2 or #3 ball-peen hammer.
3. Put on a pair of safety glasses.

4. Tap the carb with some even medium strokes around
the sides.
5. Rotate the carby as you go, being careful not to
strike the fingers.
6. Try to apply even adjustments all the way round.
7. Turn the carby over, and adjust the bottom as the
top, again using care to evenly apply the adjustments.

8. The old uncooperative carb will not need further
adjustments.

See the the nifty "replacement" carb on the right ?
Notice that it is in much better shape than the old
carb....it will probably work better than the old one....

....and just having witnessed what can happen to a
stubborn carb...it will probably work quite well for a
long time to come...

Just here to help...

Dave.

Well Dave, I think you lost the plot. I mean, where am I going to get a #2 or #3 ball-peen hammer? Its big or its nothing in my tool box

Anyway, certainly seems like something is amiss amongst all of this. I have enclosed a photo with both bits and I have also included one of the motor, just so we can confirm its identity as well. Do you remember me mentioning that it was a dog to start before :-) Well now we nay just know why that was. Anyway, have a quick squizzy and let me know if it is all wrong.

And if you can't laugh about these things what can you do. You were jocking about the hammer bit weren't you Dave? Huh? Dave?

Many, MANY thanks,

Martin

And the Motor, body, chasis whatever.......

Personally, I think you 2 guys have too much free time on your hands! As for the carb; The needle valve is the right one. The one you have on yours Dave is a rare one. Only 2 of my motors have that one. The other 6 have the other kind. There are only a few places air can come in on the 7B carb. I am starting to think it might be the seating of the carb and the 2 mountimg screws. Another idea is how much back pressure is coming from the muffler? Is the fuel being forced into the carb?
Any chance you want to ship the motor to Canada? I could probably fix it for you or rebuild the carb at least. It is really hard to figure out what the problem is over the internet. By the way, I sent both of you the 7B instructions. Later.... Bob

....check post #27....doesn't that nozzle look a little
"flaired out" to you...?

I have two 7B's, and they're both the same....I didn't
know there was different vintages of them....

BTW....I picked up a nice FSR the other day myself ....
This one has a long throttle arm on it, a 7H carb.

Yeah, Bob....we're just out here having a few chuckles
waiting for you to give us the correct answer

Hi Dave, I kind of thought the same thing, but one can't be sure. That's why I wonder if the back pressure might be high. Another concern I have is the seating of the carb on the engine itself. If there is a air-leak there it can have some really weird symptoms on the running of the motor. Another question that I think needs answering is, does the prop rotation of an engine being run in Austalia turn the same as in the Northern Hemisphere? I Know the water in the toilets turn differently. What do you guys think.....

Next time I will proof read what I write. I really do know how to spell Australia. Sorry about the typo. .... Boob... I mean Bob

...." Anyway, have a quick squizzy and let me know if it
is all wrong."

I'm afraid to ask what a "quick squizzy" is, Bob....

....why don't you ask him....?

Dave.

Before you ask, the motor runs anti-clockwise and 'Squizzy' a 'Gecko' and an 'eye-ball' have a lot in common :-)

I went to the local hobby shop today to complete my plunge into depression as I glanced around the only hobby shop within 70K's of here, and looked upon all the dolls houses, plastic kit models, a spitfire on commision sale and an old cardboard box with 3-4 plastic bags sporting 'Full Ahead' gear. As for any spares for O.S. engines, what was a spare and better still what was a'O.S.' ??

Anway, here is the news. Tomorrow morning I am going to try something really sinister. I am convinced that the needle valve is the problem. Mainly because I can do something with that. I am going to disregard all the advice, oh yet again, and try starting it with 1 - 1 and a half turns from closed and see how much fuel it guzzles or not. Now, at this point, someone jump in and tell me 'No No, Bad bad, better to try and.......'. Well? Anyone?

How would I even check the back pressure of the exhaust?

If there is a genuine offer to ship it to Canada I am sure it couldn't cost that much could it? I just realised that I am a constant surfer on e-bay and didn't notice any FSR for sale then realised your there and I'm not :-)

And finally one more thing. Why the 'F' in SR? Doesn't say that on my motor? Funny world this. I think I should take up fishing. My week off is nearly over and I still haven't chucked a single lappy around the dam :-)

Thanks,

Martin

The "F" means front....as in carb location....

....but you have the motor mounted backwards, and they
knew you were gonna do that....so they left off the "F".

....(snick snick)....

Tee hee :-)

See, I have nothing better to do now but to troll ebay looking for a replacement engine. Now I have homework and all sorts of things to do. I think I may just leave it all until AFTER the test tomorrow. I just hope someone looks upon me in the morning :-)

Keep all your fingers crossed,

Marty

Hi Bob and Dave,

Well I suspect that you would like to hear some good news? Well like a dream it worked. One full turn plus 2 clicks and it was running like a dream.

Just to paint some more of the picture because that's not all I found. It has been some time since I've heard this running 'cause part of the problem was ME hearing the noise. When it was 'Screaming' it was only just above idle really. It sounded excessively noisy to me but once I got used to it, it wasn't really a scream after all, just loud, (If that makes sense?) Also, I thought that I had the carby closed enough to be on idle but I have found that I was starting the boat with too wide a carby and that you only need the smallest minutest opening to have the thing on idle. ALSO, finally, it really does let loose without load on it and every now and then gets a 'Vibrating' sound, quite excessive, although I am hoping that this is the running gear now. Something else to look for :-)

So guys, I shall sail it this arvo and make good use of my last days holday before work again on Monday. I really enjoyed this and you'll see more of me in here :-)

Again, thanks,

Martin, having a squizzy, this arvo, at the Boat From Hell !!!! (May even take my camera)