Whiskeytrain Posted September 12, 2016 Report Share Posted September 12, 2016 Hey guys, I have a 2000 18ft bayfisher with a 2000 115 Yamaha. The engine recently took a crap and looking to repower. I'm still debating on new or used. Also, would the weight of a 4 stroke be too much for the boat since it had a 2 stroke before? Would it be too heavy on the stern and ride low? Looking at another Yamaha but open to suggestions. I am in Fort Lauderdale so any advice on where to go for repower on new or used outboards would be appreciated. thanks Link to comment Share on other sites More sharing options...
polliwog Posted October 15, 2016 Report Share Posted October 15, 2016 I just repowered my 20ft LT from a 150 Yamaha 2 stroke to a F150. Weight difference was only 50+ lbs and made no difference in the stance of the boat. You need to see what the new Yamaha or Suzuki 115 will weigh. I bet it isn't that significant. Link to comment Share on other sites More sharing options...
Tony-347 Posted February 12, 2017 Report Share Posted February 12, 2017 I am on the same "boat" with my 1994 Tournament 16', I too want to repower. After long conversations with several more experienced boat owners, I have learned 2 things. 1) The Yamaha 2 stroke to 4 stroke upgrade in the 90-115 hp range are 100 lb's heavier. 2) If you under power to save on the weight, you will put more strain on the motor while cruising. I was considering a F70, that weighs about the same as my Yamaha 90 2 stroke. However it would always be run at WOT and still wouldn't run the same speed as mine now. One could relocate the battery to under the console to give a bit more balance, but that would beat up the battery in rougher weather. Also, I read a bit ago, that the sag of the heavier motor causes porpoising. I haven't been able to confirm that. I am looking for a used Yami 90 2 stroke, preferably newer with a bad powerhead, (or something repairable) or a reasonable quote on a Yami F90. Most of the "claim to be running" 2 stroke 90's are in the $4300-$5000 range. A bit pricey for a about 10 year old box of surprises. Hewes in N Miami quoted me $11k without gauges, steering, or controls (using my current ones, I have 2010 gauges, wire steering, and a Yamaha 704 control.) I have seen the motor go for $8,600 + install, about $9,100, with all the warrantee and all. (Saving up for it.) I live in Hollywood, Fl. so if I get something reasonable, I will share my point of contact. That being said, any other pointers or oppinions would be greatly appreciated. Link to comment Share on other sites More sharing options...
mulligan Posted February 12, 2017 Report Share Posted February 12, 2017 The new F115 are lighter than the "older" ones. Yamaha claims 377lbs. The oil injected 2stroke were about 370 if my memory is not off. I do not think you are going to notice 7lbs. If you have a "C" model 2stroke, they were lighter than the oil injected at about 320lbs. Link to comment Share on other sites More sharing options...
Tony-347 Posted February 12, 2017 Report Share Posted February 12, 2017 My 90TLRS (1994 2 Stroke) weighs 261 lbs. dry, and the new F90's weigh 377 dry. Link to comment Share on other sites More sharing options...
DonV Posted February 12, 2017 Report Share Posted February 12, 2017 I thought I read/heard the F90s have steel cylinder sleeves, which is one of many reasons, along with the overhead valve train, that they are so heavy, versus 2 strokes and some of the newer 4 strokes that do not have steel cylinder sleeves, like the F70, 4.2L Yamaha big blocks, etc.. It's one way they keep the weight down, however the engine blocks can only be used once, no cylinder repairs, pretty much a "throw away" item. Link to comment Share on other sites More sharing options...
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