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Old 28 July 2009, 17:27   #1
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Searider 5,4 advice

Hello,
i have the 5,4 with closed flooding hull.
Engine is a Yamaha 75aet with trim.
The engine is mounted 1 " to starboard. The caviation plate is equal with the keel.
It does not run bad, but hanging to starboard, even at speed. I think its more at high speed as in low.
Its against the rule , because the prop should have the effect of a spinning wheel.
How is the setup at others sr54??

Mike
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Old 28 July 2009, 17:36   #2
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mike, my cav plate was level with the bottom of the keel, and the engine if i remember is centrally mounted,as its the consol that is offsett to the starboard :hope that helps thumbs:

nos is shit hot on installations!!
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Old 28 July 2009, 18:13   #3
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Mike,
As your console and motor are offset, as matt h suggests, you have too much weight on the stbd side of the boat. Are you able to move the console nearer or onto the centreline of the deck to give a better weight distribution?
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Old 29 July 2009, 02:08   #4
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Country: Germany
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Quote:
Originally Posted by matt h View Post
mike, my cav plate was level with the bottom of the keel, and the engine if i remember is centrally mounted,as its the consol that is offsett to the starboard :hope that helps thumbs:

nos is shit hot on installations!!
Thanks Matt,
but on the pic with the hull, the original holes are also with an offset to SB.
I got a list from Avon with the offset for diverse power.
It says 1" up to 75HP and 2" up to 90HP. My plate is flat to keel.

Thanks Mike
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Old 29 July 2009, 02:22   #5
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Your console looks a good bit bigger and heavier than the one that Avon fitted.
Can you not mount the engine central or shift some weight around?
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Old 29 July 2009, 02:50   #6
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Quote:
Originally Posted by matt h View Post
mike, my cav plate was level with the bottom of the keel, and the engine if i remember is centrally mounted,as its the consol that is offsett to the starboard :hope that helps thumbs:

nos is shit hot on installations!!
Looking at the photos of your hull Matt in its original form, I would say the engine is mounted to starboard when it was last rigged, as the outboard mounting holes are off set?

Did you mount the Yam 90 in these same holes ?
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Old 29 July 2009, 03:53   #7
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i have standard console, yam 80 2" offset to starboard, and ventilation plate level with the keel and its spot on straight at speed.
I rekon its the weight of your console mike. have you tried playing with the trim anode behind the prop? may help a little.
it doesnt take much offset weight to make the boat pull one way, i can steer mine quite easily by leaning left or right while sitting at the helm.
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Old 30 July 2009, 15:31   #8
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Quote:
Originally Posted by doggypaddle View Post
i have standard console, yam 80 2" offset to starboard, and ventilation plate level with the keel and its spot on straight at speed.
I rekon its the weight of your console mike. have you tried playing with the trim anode behind the prop? may help a little.
it doesnt take much offset weight to make the boat pull one way, i can steer mine quite easily by leaning left or right while sitting at the helm.
Hi, i forgot the trim anode. Its true, while driving , the steering is hart to one side.

I will try on saturday to adjust it.
You think i can leave the engine 1" to starboard.?

Mike
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Old 31 July 2009, 06:41   #9
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Quote:
Originally Posted by mike-stgt View Post
Hi, i forgot the trim anode. Its true, while driving , the steering is hart to one side.

I will try on saturday to adjust it.
You think i can leave the engine 1" to starboard.?

Mike
well your engine is exactly where it should be, its the console thats wrong, as to wether you can move the engine to compensate i cant answer, but my initial thoughts are you would have to move it a long way to compensate for the off centre weight of the console, and it might pull right even worse.
I would try fiddling with the anode first, then use sandbags as ballast to see if that cures it, with a view to centralising the console.
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Old 31 July 2009, 16:26   #10
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Hi,
as the console is only 4 inches beside the midline ansd it has 40-50kg , it is only 10kg to balance. Also the engine with 125kgs.

While standing it is true with the balance, but normaly the prop should lift the starboard side a little, while moving. The overweight to starboard side should balance the torque. But i do not know how much it has to be.

Mike
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