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Old Apr 04, 2013, 07:07 PM
RC boat Rock Star
Kalamazoo, MI
Joined Apr 2004
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Like Ian said, wait until you're not fighting icebergs and get a larger place to run before going crazy with adjustments.
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Old Apr 04, 2013, 07:27 PM
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United States, MA
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i'll try again this weekend
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Old Apr 05, 2013, 05:29 PM
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ok I tried again today; drove a bit better but I can see the prop is part way out of the water when it's driving. I need to put some weight in it. one of the bolts that held on my muffler sheared off and the muffler sank but luckily I have a new muffler and head.
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Old Apr 05, 2013, 05:53 PM
RC boat Rock Star
Kalamazoo, MI
Joined Apr 2004
2,950 Posts
Being a surface drive setup you may see the prop. If it has a cavitation problem then you're going to have to lower the strut.
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Old Apr 05, 2013, 11:05 PM
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darn I think I need to lower it
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Old Apr 06, 2013, 07:00 AM
RC boat Rock Star
Kalamazoo, MI
Joined Apr 2004
2,950 Posts
How high up from the bottom is it? A rough starting spot would be the center of the drive from the bottom would be 1/2". The higher angle of the V the further up the strut should be.
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Old Apr 06, 2013, 08:54 AM
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it's a half inch up. I've done everything you said to do
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Old Apr 07, 2013, 06:50 PM
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United States, MA
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swapped out the engine for the old one I had. it's creating way to much vibration, stuff is breaking.

when I tried to pull out the flex shaft out to grease it was kind of hard and it turns kind of stiffly. there was still a bunch of grease on it and only a few water droplets. I hadn't greased after any of the runs but I thought it'd be fine because I never ran it for more then a minut.

the rudder hinge pin fell out again and now there a bunch of scratches on the rudder from the prop.
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Old Apr 07, 2013, 09:19 PM
RC boat Rock Star
Kalamazoo, MI
Joined Apr 2004
2,950 Posts
OK, here's the part where we start asking you questions.
Did you use vibration isolators on your motor mounts?
Any kinks in the stuffing tube or misalignment anywhere? Look for wear on the cable.
The rudder sound to be mounted too close to the prop. normally we go 2-1/2" to the right of the strut but 2" should do. in the meantime you may have to cut down on the rudder throw.
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Old Apr 07, 2013, 09:53 PM
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United States, MA
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no vibration absorbers, couldn't figure out where to stick any. stuffing tube is barely bent. only misalignment would be in the strut (it was hardest to put the flex shaft back in it). the rudder doesn't hit the prop even on full throw, it hit because the rudder fell off and was hanging off the pushrod which allowed it to vibrate over to the prop.
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Old Apr 07, 2013, 11:07 PM
RC boat Rock Star
Kalamazoo, MI
Joined Apr 2004
2,950 Posts
Without the isloators that boat is going to shake itself apart. It's not good on anything from the hull to the radio gear.
Try driving a car sometime that has solid motor mounts, the same thing otherwise they wouldn't need them.
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Old Apr 08, 2013, 06:59 PM
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how should I put vibration absorbers on?
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Old Apr 08, 2013, 11:53 PM
RC boat Rock Star
Kalamazoo, MI
Joined Apr 2004
2,950 Posts
I have no idea as I don't know what your setup looks like.
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Old Apr 09, 2013, 08:13 PM
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i'll get a pick.
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