USCG Max Capacity for 1979 18' Seacraft

[autombo]

I just recently purchased a 1979 18' Seacraft and the USCG Max. capacity plate is missing. I have all the information i need except the max. number of people or lbs. Also, where can i order one? I looked at the letter rite website and they require a minimum of 10...Any help would be greatly appreciated. THANKS

[Fr. Frank]

Do you just want to know the max capacities, or do you want the decal? You can figure out the max capacities if you want, using the USCG formularies.

[Fr. Frank]

The formula for USCG recommended maximum horsepower is simple: for a sterndrive, or a 20" or 25" transom outboard, (LxWX2)-90=rounded to the next higher 5hp increment max recommended hp . (For a 30" transom it is (LxWX2.5)-90=max HP) Length and width are LOA and WOA, and are calculated to next higher foot measurement. The 18' SF is actually 18'2" , and the beam (including rub rail) is 7'5", giving you 19' and 8' respectively

So the calculation is 19x8x2-90=215 hp maximum. Your real limitation isn't HP, it's weight.

If you raised your transom to 30", your max HP rating would be 290 hp.

According to the USCG, LOA includes permanent fixtures such as bow pulpit, dive platform, anchor rollers, engine drives, etcetera. It does not include OB motor . So if you have a swim or dive platform and an anchor roller your 18 could easily be 21' or 22' by USCG specs.

My 20' Seafari has both swim Platform and anchor roller, giving me an actual LOA of 22'2". So for my Seafari I would calculate (23x8x2)-90= 280hp maximum. I actually run a 90hp Optimax.

This fits with the max power originally offered with the '75 Seafari being a 255hp Mercruiser sterndrive, with a max hp rating of 265 sterndrive hp.

[autombo]

i just need the maximum number of people or weight i can have onboard. The brochure has everything else i need. Thanks

[1Step]

Let me check my 1989 18' and I'll get back to you. I do know the max HP is 150.

[asdfhood]

Plate on my 1987 18' reads as follows:
Max HP 150
Max Wt 1200 includes POB, fuel, motor, gear, etc
Max POB 5

This is a Tracker hull.

[autombo]

Thank-you