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ops 67 running help needed

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ops 67 running help needed

Old 04-15-2012, 05:28 PM
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Default ops 67 running help needed

i have a miller american 1/8 , the engine is a ops 67 , 3 blade prop, i cant get it above 1/2 throttle with out dieing out, pond temp is 43 degrees, ?? could the water temp be an issue?? any help would be great cause i cant figure it out?? Barry
Old 04-27-2012, 12:59 PM
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Default RE: ops 67 running help needed

Barry,

Usually when an engine cuts out (stops) on applying throttle, the high speed mixture is too lean.

With the boat on the bench, try getting the high speed needle set so that the engine noticeably ‘bogs’ when you apply (rev) the throttle. When you put the boat in the water and load the prop, as you apply throttle, the mixture will ‘lean’ out.

If the boat continues to stall, keep opening (CCW) the high speed needle an eighth of a turn at a time and see if it gets any better.

Certainly the 43 degrees isn’t helping your nitro motor make power…but you should be able to get a mixture setting that will keep it running.

Other things it would help knowing:
- What % nitro fuel are you using?
- What glo-plug are you using (a McCoy MC9 will work in about any nitro motor. If it is really cold I’d try a MC59)
- I assume you have a tuned pipe (???) What is the measurement in inches from the center of the spark plug hole to the fattest part of the pipe?
- What prop are you using? The number is usually on the back edge of the hub)

Good luck. I’ll try checking back on this thread. RC
Old 05-13-2012, 08:44 AM
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Default RE: ops 67 running help needed

found out what was wrong with it ,  it is the head  is leaking water    and killing the engine , not to mention getting water every where  ,  bad thing is i cant find parts for it????
Old 05-28-2012, 08:59 AM
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Default RE: ops 67 running help needed

go over to international waters

www.intlwaters.com

there is a dealer in canada that handles and sells OPS marine motors.

it is a free forum and once you join, there is a wealth
of knowledge there.

Carl
Old 05-28-2012, 03:35 PM
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Default RE: ops 67 running help needed


ORIGINAL: carlnoki
go over to international waters
www.intlwaters.com , there is a wealth of knowledge there.
Same nitro-savvy people are also here :-)

ORIGINAL: barry3rd

found out what was wrong with it , it is the head is leaking water and killing the engine ,
not to mention getting water every where , bad thing is i cant find parts for it????
That all can be helped (yourself) buy Loctite Blue-silicone , and do this :

Dis-assemble engine , take liner from cylinder , clean both surfaces ,
and flatten the liner-rim on sanding-paper glued on a piece of FLAT wood.

If done , apply some blue-silcone there where the liner is going to be later on.

Slide the liner into the cylinder , and HAND press it in .... let it dry overnight.

Put a glowplug into a (cordless) drill , screw plug into engine-head , apply some coarse polishing cream ,
(or toothpaste) and press engine-head into the liner , and start the drill.

This way you'll match the two surfaces.

Rinse the liner/cylinder , and let it dry.

Apply a tiny bit of blue-silicone to the engine-head (and/or shimms) and press together.

Assemble engine (cylinder/watercooling head etc) and do the bolts light hand-tight , and let it sit for 12h.

Now you can assemble your engine , and have fun.


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