Differance in a #4 a #3???
#3
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#4
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#5
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As far as I know, the 4 is a shorty 3 and the 5 is shorty 3A. I didn't know they had different shafts for the 4's.
Based on that, the 4 is a little weaker. I think they are still rated about 700hp.
Based on that, the 4 is a little weaker. I think they are still rated about 700hp.
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A #5 will havea large prop shaft. Be careful because you can get a 4a with a large shaf also. If I remember there is a diffenence in lower case thickness for the beefed up shafts in the #5 stuff.
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Small and big shaft size refer to the prop shaft. Props come in 2 sizes for the SSM.
Small shaft (SSM II, III, and some IV) are 19 spline. Big shaft (SSM IIIa, V, VI and some iVs) have 26 spline. The big shaft IV will be stronger.
Small shaft (SSM II, III, and some IV) are 19 spline. Big shaft (SSM IIIa, V, VI and some iVs) have 26 spline. The big shaft IV will be stronger.