100hp on a 20 sf?

[eggsuckindog]

I agree the only 4 stroke that seems to work is the 140 Zuke, Yamaha does not seem to make a motor that fits correctly - granted anybody can do something dumb and there is no law against it

You just described SUZUKI

[FishStretcher]

I just bought a F100 for my 20 M.A.

What prop do you run, and do you run a fin? A new prop is in the budget.

Ive got a 99' F100 and its a great motor. Only thing is dont let gas sit for a long time in the carbs or it will get gummed up and they will have to be cleaned. The only issue ive ever had with it, is the voltage regulator went bad last season. So 11 year old motor and only issue to date was a voltage regulator. Always starts first crank as long as youve got good gas.

[Bigshrimpin]

SeaCraft- but the concensus here is that less is ok- why is that?

Fish - congrats . . . Now that you have reliable power . . . I'd forget about the kicker motor (until you have the bracket on) and just seal up the splashwell and splashwell gate as best you can. Trim Tabs will help a lot.

[Bigshrimpin]

Interesting thread- I posted some months ago here that I was considering repowering with a 150 Yami 4stroke from my current 200 Opti- I received a lot of "don't do it" comments even though I think 150 hp is plenty for a 21 ft. SeaCraft- but the concensus here is that less is ok- why is that?

Jacks your 21 is based on the 23. 150hp is NOT adequate power for your 2000 21 (23 - 2ft). 20's and newer Tracker 21's are very very different boats. FishS has a 20MA with a original 20" transom. It's got a wide transom with a wide open splashwell. He'll need to shed any extra stern weight to keep the transom above water. The 21/23 is a totally different story without any of the weight limitations FishS is facing here.

[77SceptreOB]

Jacks your 21 is based on the 23. 150hp is NOT adequate power for your 2000 21 (23 - 2ft). 20's and newer Tracker 21's are very very different boats.

I thought the hull shape on those newer Tracker 21' looked different than the original SC 20's. The leading edge looked more like a 23'. Glad you confirmed that. I guess the Tracker 21' was a hybrid between the Potter 23' and the Moesly 21'.

[Bigshrimpin]

The new 2000 (or whenever they were introduced) and newer tracker 21's are based on the 23 . . . not the 20hull. It's essentially a short 23 hull.

[bj]

I have a 2003 21' with a 200 Merc EFI. I know I wouldn't want any less HP. I would love to have a 225 on mine. I had a 1969 20' with a 140 on it and it was a good match. There's a lot of difference in the two boats.

[FishStretcher]

any opinions on a prop?