2001 hpdi 150 on 1976 sf 20'

[Servicecall76SF]

Wondering if anyone has this motor on their 20ft potter hull that hasn't raised the floor. Very interested in a motor but concerned about the 475lb bohemith on the back. I will be rebuilding the transom to raise to 25 with coosa this winter so strength is not the issue. I 100% understand that these boats were made for lighter motors but I have also seen many 200 hp motors hanging on the back of them too so it can't be all that bad. I rarely take trips out in the ocean and if the boat is loaded with people they are sitting in the front anyway.

[deerfly]

its all a matter of whether you want to maintain a self bailing cockpit or not. Plug the scuppers and most any o/b will work.

[jwclbi]

I have a 225 yamaha ox66 think its 485 lbs and my 20' SF still self bails. Hope that helps

[deerfly]

Originally Posted by jwclbi

I have a 225 yamaha ox66 think its 485 lbs and my 20' SF still self bails. Hope that helps

does your deck flood?

[jwclbi]

If I stand on one the aft hatches a little water will come up through the deck drain. I'm 170lbs. Full fuel, coolers, 4 people, a dog or two on board I put the the plugs in when idling cause it will fill in a bit more. Hope this helps

[jwclbi]

If I stand on one the aft hatches a little water will come up through the deck drain. I'm 170lbs. Full fuel, coolers, 4 people, a dog or two on board I put the the plugs in when idling cause it will fill in a bit more. Hope this helps

[Servicecall76SF]

Thanks for the replies guys, I felt like it was just too heavy so I passed it up. I have a 150 fast strike on it now and if I walk to the back with a buddy water will fill those little gutter things pretty far up the sides. I just wanna avoid all that if I can. I'm interested in a 2005 evinrude 175 right now. Only weighs 375. I'll check back in if I make any decisions. For what it's worth I always plug the holes no matter of it's just me or 6 guys on the boat bc if anyone walks to the back water comes in.

[cdavisdb]

I'm a little confused. From experience, a 2 stroke 150 black max was plenty of power for a 20 Seafari, even seriously overloaded for scuba diving. I don't remember speed very well, but 25 knots at cruise(4000 rpm) sounds right. Much of the time it was too rough to use the power. Loaded light, WOT was in the 40 knot range. Does weight of a modern engine make that much difference?

[Fr. Frank]

Originally Posted by cdavisdb

I'm a little confused. Does weight of a modern engine make that much difference?

It does make a difference, but I was exaggerating and exercising sarcasm.

I ran a 90 Opti on my 20' Seafari for 5 years and was happy with the performance. I had no need for exceeding 30 kts because in anything over 2' seas I occasionally got airborne with the previous Merc V6. Yes I could touch 46 knots/53 mph knots in a very light chop, but just over 1 mpg in a 20' family fishing boat is silly.

But it is true that when you mount 450 lbs for a motor you really need a stern-lifting prop.