Has anyone recently re-powered?
Submitted by Swompa on Wed, 2019-07-10 07:42
My father is looking to re-power his 17 Guardian.
The boat currently has a 10 year old 70hp Yamaha 2 stroke on it. They mainly target squid and herring along with pulling cray pots so don't go too far or too fast.
IF anyone has recently done a re-power in the 70-90hp range, can you please let me know what you got and why?
Thanks in advance
little johnny
Posts: 5330
Date Joined: 04/12/11
I went from 90 2 stroke yammy
To an 80 four stroke yammy few years back. Reason I went 80 hp . ( same motor as 100 hp) just different chip. My boat just over 17 feet. 4000 revs still sit on 20 to 21 knots.5000 rpm gets 26 to 27 knots. My thought was 80 would last longer due to being same specs as 100 hp so even if I opened motor up to full wouldn’t matter. If that makes sence
hezzy
Posts: 1519
Date Joined: 27/11/09
i upgraded a 97 two stroke
i upgraded a 97 two stroke yammy , replaced it with a new 2016 90hp two stroke yammy
i did not go to a four stroke
my thoughts where
4 stroke was somwhat heavier and may affect the balance of the overall boat at rear transom
out of the hole speed or get up and go from standing start , pulling pots of margs i need quick acceleration often , feedback was the 2 was better overall in that regard
noise and fuel cost where not an issue for me in considering the motors
the first yammy had performed excellently , and this second motor has been the same
OFW 11
evil flourishes when good men do nothing
VIC DORY
Posts: 308
Date Joined: 28/05/15
I replaced my 2003 Yamaha 115
I replaced my 2003 Yamaha 115 2 stroke last year with a new 115 Yamaha 4 stroke..
10kg heavier, zero noticeable difference in out of the hole speed, top speed identical, fuel bill halved, range doubled, no noise, no smoke.
4 stroke all the way!!!!
VIC DORY
Posts: 308
Date Joined: 28/05/15
I replaced my 2003 Yamaha 115
Double post
Andy_b
Posts: 633
Date Joined: 19/10/11
have a trail craft pro fish
have a trail craft pro fish 4.65 had an old merc 50hp 2 stroke, re powered with a 60hp yamaha, best think i evea did, fuel bill is halfed. runs mint and can spend 6 hours snapper fishing in the sound and use 10 dollars worth of fuel,