60 will most likely be too much as that's more like a 37% increase in area, but I would rather go more then needed and start making some jetting passes and work your way down. I prefer reading piston wash over plugs, if you are going to read plugs you need to make sure you are looking at the base of the plug for reading, using one method to confirm the other is the bestOriginally Posted by hupiveneilija
Ok. If I have something like 55 I go with that or make one for those I got. If you think 60 is too much. I have plenty of carbs in a box! Also have three carbs from 2cyl, they are bigger than 70 ones. Maybe try one day.
Actually I have tried those before with old boat, it felt kind of a stronger for take off but made bowls empty after 3500rpm. I think that pump doesnt made enough then.
It's funny how in 1989 they had two sets of carbs, the early sets had 65s and the later ones had 52s in them and in the early 90s they went to 50s. I just learnt something. I wonder if you would benefit from a set of older carbs.
Yes and thoseearly 65 dont have idle jet at all, dont have even hole for that. 52s have idle jet, or viceversa dont remember wich way😂. Then there is middle jet, some have for fuel, some for air. Fuel version have screw front of it. And this new version with idle screw. And ovalport blacktops with idle screw and 2 jets.It's funny how in 1989 they had two sets of carbs, the early sets had 65s and the later ones had 52s in them and in the early 90s they went to 50s. I just learnt something. I wonder if you would benefit from a set of older carbs.
Tube from bowl to venturi different in all carbs.
Older with chokeflaps. Somewhere like -83 and on primerchoke.
Very confusing.
the Bridgeport 70hp 56er carb has the same venturi size as the two cylinder. Are your carbs form the 56er 60hp motor?
No they arent, from 1992 70hp. I think biggest 3cyl carb. I have three sets of 60hp carbs, way smaller. Those three even bigger than 70 I think they are from 2cyl 60hp.
Ive got all 3 model of 70 plus later blacktops.
2 cylinder 60hp carbs are same venturi as the 1992 70hp
Have another problem now.#1 stuck like it was before when I opened PH. Think it has to be something with cooling. And salt&water, no good. Might put another PH on place.
If it have 2 stock pistons and middle .020 over should I jet it different?
But hey, atleast older electronics work! No rev limiter😂. Think I put that head to stock PH as planned originally and see how it works. Have to get some driving hours for setting the boat as good as it can be.
Maybe a little chamfer on the export😬.
Cant load pictures.
Did you blow another head gasket?
Regardless of the piston size you jet each cylinder on it's own.
Are those needle bearings dirty or on their last leg lol
when I tell people there are bigger carbs out there they dont believe me.
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