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4" SS risers dont line up?

1416 Views 6 Replies 5 Participants Last post by  Dweiss67, 
D
Just put my engine back in and the risers don’t line up with the standard merc holes. They are offset buy a half inch or more. An offset would be the quick fix but I looked all over the web and no luck.

My 242 with the standard merc risers worked fine but they were not as close as this GIL set up is. This GIL setup should fit the holes per the instruction but thats life. Any ideas would help, I thought to take the risers to a muffler shop to see if they could put an offset in them but I don’t think they can bend that gage SS and with the water jackets inside that is realy not an option.

Another fix is to over drill the four bolt holes and that alone might give me enough to make them align. Who knows, just thought I would ask I know someone has had this problem before me.


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Horse power
I would try to hook the rubber to the tip then to the riser (off the manafold) than push the risers over the bolts on the manafold and tighten.
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Rattlesnake Jake
Dweiss67 said:
Just put my engine back in and the risers don’t line up with the standard merc holes. They are offset buy a half inch or more. An offset would be the quick fix but I looked all over the web and no luck.

Another fix is to over drill the four bolt holes and that alone might give me enough to make them align. Who knows, just thought I would ask I know someone has had this problem before me.


Thanks
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Bingo!! I drilled the riser mounting holes to 1/2". Gave enough swing to connect to the transom with no problem. After cutting the hose to the desired length, I mounted it on the transom first, put some liquid soap on the riser so they would slide easy in the hose and fall in place on the manifolds. Good luck.

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Thanks guys, I think that is the answer. I been on the phone all day looking for a quick fix but no luck. If this dosent work too the chop shop they go for welding.
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Mopower
Afriend with a 242 did the same thing. Height was OK but side ti side alignment was off 1/2 to 3/4 of an inch. Took a Dremel and egg shaped the holes in the flange on the elbow so it could be rotated slightly ;)
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Ran into the same problem on my 206LS. I think there was about 3/4" on each side. And to make matters worse the starboard side was higher than the port side to clear the Merc power steering cylinder.
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D
Fixed the problem, honed out the holes and used new silicone hoses to make up the rest, works fine!

Now I have to change my valve breathers back to the standard carb setup. I had it out on sat and the gases set off the alarm system even with the blower on all the time. They look good just not functional for a boat.
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