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Old 10-11-2013, 05:11 PM   #1
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K&B .82 hard to start!

As the title says, k&b nitro engine is a bast... to start! Tight spot at tdc is so bad it won't turn over on the belt while in the boat, for fear of breaking the engine mounts. Have it on the bench now hooked up to a small tank. Will run momentarily while on the starter motor but won't stay lit!

Any ideas?

Thanks...
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Old 10-11-2013, 09:10 PM   #2
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I would richen up needle on carb. Sounds like its too lean. You can also make sure your glow plug is ok. Nitros are known to have the tight spots so thats not nothing to worry about.
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Old 10-11-2013, 10:25 PM   #3
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Country: Ireland
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Boat make: Hydrostream V-king, 650SS OCR ,Ring 21, Ring 18, Phantom 18.
Engines: 300Hp Mercury 2.4, 130 Yamaha, Bridgeport EFI, XR6, Merc 200.
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Thanks, yeah not too concerned about the tight spot too much as I've had nitros before but none as big as this .82 so never got as tight while cold cranking.
Was reading on the k&b site about starting etc but not sure if its relevant as the previous owner had changed the carb from the remote needle assy type to a carb with needles in it.

Anyway, you think it's too lean? Ill try fatten it up, was 3.5 turns out on the main and adjusting a turn in either direction with no noticeable difference.
How the hell ill get this to start in the boat without pulling it out of its mounts.
Not sure how much run time is on it as its second hand but it looks very fresh.
Will the tight spot loosen up with run time??

Thanks for reply
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Old 10-11-2013, 11:24 PM   #4
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Is it a new ABC or AAC motor? I've had them exceptionally tight before running in as the bore is tapered, but they soon free up as they run in.
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Old 11-11-2013, 12:09 AM   #5
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Country: Ireland
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Boat make: Hydrostream V-king, 650SS OCR ,Ring 21, Ring 18, Phantom 18.
Engines: 300Hp Mercury 2.4, 130 Yamaha, Bridgeport EFI, XR6, Merc 200.
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Thumbs up

It's an ABC Matt from what I can tell. But no idea on its past, came with an eBay purchased boat, not actually fitted though. No idea if there's any time on it. But it appears to have run or at least attempted as there was some nitro oil in the cyl and coming from exh.
But it looks clean, no signs of wear on the liner or piston.

Will have another bash tomorrow as burnt out the glow plug! They won't take 3 volts! Was just trying to get a bit more heat in there. Did heat the head a little with a hot air gun and that helped free it up.

Ill richer it up and see how it goes! I also remember now that I had a little plastic disc that fit over the carb on my Irvine 40 to choke it while starting. Will try choking it with my finger.

Cheers
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Old 11-11-2013, 12:15 PM   #6
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Loosen plug a couple of turns then tighten once running !!
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Old 13-11-2013, 12:26 AM   #7
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Ok, got it to run for a few seconds off the starter right before the glow battery died!
Swapped the head for one with a larger bowl and it flashed almost straight up!
Would have thought the higher comp. head would have started easier..

Anyway, think it'll run now. And yeah, was too lean on the high speed needle I think! And not enough throttle open either!

Hopefully havent spoken too soon!

Thanks for the tips...
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Old 13-11-2013, 10:28 PM   #8
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Country: Ireland
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Boat make: Hydrostream V-king, 650SS OCR ,Ring 21, Ring 18, Phantom 18.
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Running now, was far too lean to crank, needs tons of fuel to get it to light up..

Ready for test run at the weekend.
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Old 19-11-2013, 10:04 AM   #9
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did you take her out alan?
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Old 19-11-2013, 12:05 PM   #10
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Country: Ireland
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Boat make: Hydrostream V-king, 650SS OCR ,Ring 21, Ring 18, Phantom 18.
Engines: 300Hp Mercury 2.4, 130 Yamaha, Bridgeport EFI, XR6, Merc 200.
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Tried to, started pissing rain and then glow battery died. So gave up... man what a way to waste time!! Takes more time to run one of these than a real boat!! Put it in the test tank in the workshop just to try dial in the carb a bit, couldnt hold it in the tank.

Will try again at the weekend, shame the evenings are so dark now. Dying to test it, should be quick!
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Old 19-11-2013, 06:06 PM   #11
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ive always found nitros hard work, hope u get a run soon
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Old 19-11-2013, 06:11 PM   #12
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Country: Ireland
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Boat make: Hydrostream V-king, 650SS OCR ,Ring 21, Ring 18, Phantom 18.
Engines: 300Hp Mercury 2.4, 130 Yamaha, Bridgeport EFI, XR6, Merc 200.
Cruising area: Malahide, Dublin

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Quote:
Originally Posted by blackbeard View Post
ive always found nitros hard work, hope u get a run soon
Thats an understatement!!! Yeah, will do at weekend Id say.
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