Re power for old 21ft glassy
Submitted by david.d on Sat, 2016-08-27 20:58
Hi all looking at re power for my 21 offshore pacemaker had a 150 Johnson 2 stroke looking at 150 merc 4 stroke. Wondering what options others have gone for on similar size boats and any info I should be aware about would be appreciated. Cheers
craig scott
Posts: 114
Date Joined: 16/10/10
A mate just repowered a 610
A mate just repowered a 610 signatue from 150 opti to the new merc 150 4st.
So good. Crazy mid range torque. Real quiet and great on fuel.
Changed my view on mercs.
Having said that though. All the newies are going to be a.big improvement on where youve come.from.
On a heavy boat like yours torque rules. Displacement.
Cheers Craig
daze out
Posts: 75
Date Joined: 07/09/11
in line 4
I have just repowered my 6.5m ali from a 150 saltwater series (2 stroke) to a 200 inline 4 (4 stroke)
The weight difference was only 13kg so wasn't an issue going up to the 4 stroke
Not sure if you're looking for any more HP but if you are the options now days are crazy and if weight is a factor definitely consider the inline 4 engines.
Patto 1
Posts: 371
Date Joined: 02/12/10
Iv got the same boat as
Iv got the same boat as yours and have a pod on the back .used to have a 150 Johnson and repowered with a 175 optimax find it good and ample power
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david.d
Posts: 61
Date Joined: 14/09/10
Going the 150 merc
Pretty much decided on a 20" 4 banger merc used to get 35knts out of the 2 stroke so figure the 4 banger will give us plenty of go
bradz
Posts: 693
Date Joined: 29/10/07
Transom height
You may wish to get the transom height increased from 20" to 25" before you get the motor. Its an easy job for a fibreglasser, shouldn't cost much and will get the Power head of the motor further from the water. Always a good thing. You may also find it easier to find a 25" than a 20" as they are pretty rare these days and may even be more expensive.
I did then the best that I knew how. When I knew better, I did better.
Ashen
Posts: 1042
Date Joined: 22/03/13
2 strokes
No experience with 4 stroke outboards but I think a 150hp 4 stroke will provide same or slighly less "go", due to added weight and not as torquey as a 2 stroke. Maybe a 175hp 4 stroke might be a better option?
You'll save on fuel though... had a 150hp johnson oceanpro on my old boat, and it was a thirsty f&%ker!
A fish in the hand is worth 10 in the water!
bobakers
Posts: 23
Date Joined: 05/06/11
2 stoke to 4 stroke
Hi
Upgraded the Baron from a 150 rude 2 stroke to a suk 140 last year, also chaged the transom to 25" ($1000).
Definetly not as much punch getting on to the plane which is to be expected but cruising at 4000 rpm and fishishg for a day Im using exactly 1/2 of the fuel I used before, no smoke and you can actually hear people talk.
Would have liked to go to a 150 4 stroke but budget just didnt stretch. am happy with the 140.
With the 150 -175 4 stroke I dont think there is a bad engine out there. Would get down to who can provide the best aftersales service and initial price fitted.
Bob