Riser elbow & intermediate elbow

[SeaboldWarrior]

hello all, doing a 5.7 repower, 350 MAG MPI out, 350 MPI in, complete engine. Original engine had 3" risers and 86439T02 Elbows, new engine could not take 3" because they have 864591 elbows, but they have a 1.7" which puts it right where it needs to be, except one small thing, the intermediate elbow didn't line up, that's when I realized the original 864309's were 7 degree, new ones are 14 degree, so after much research I come to find 866003A01 intermediate elbows, I can't seem to find any info as far as there degree? Anyone have this issue before, and is it safe to say 14 degree's ok for this change over?

 

[alldodge]

Welcome

Trying to figure this out
Plugged in 86439T02 into Bam and Mercury marine and no good, might be missing a digit

866003A01 is used where 1.7 inch riser is used
866004A01 is used where 3 inch riser is used
866209A01 is used where 4.7 inch riser is used
866005A01 is used where 6 inch riser is used

https://www.mercruiserparts.com/bam/subassembly/31750/11681/340

 

[SeaboldWarrior]

Welcome

Trying to figure this out
Plugged in 86439T02 into Bam and Mercury marine and no good, might be missing a digit

866003A01 is used where 1.7 inch riser is used
866004A01 is used where 3 inch riser is used
866209A01 is used where 4.7 inch riser is used
866005A01 is used where 6 inch riser is used

https://www.mercruiserparts.com/bam/subassembly/31750/11681/340

Thank you, the number was supposed to be 864309-C or T02 and I guess everything went to 14° ??

 

[SeaboldWarrior]

Ok, how about # 865951-C or 865951A01 how does this part differ from 866003A01 ?
Searching the 866003A01 # brings pictures of elbows with 865951 #'s

 

[alldodge]

I'm using BAM mercruiserparts enter part number in the parts search

865951 list 14 inch long
866003 list 17 inch long
https://www.mercruiserparts.com/866003a01-elbow-exhaust

 

[SeaboldWarrior]

I think those are shipping dimensions

 

[alldodge]

I think those are shipping dimensions

Very likely but those parts may need to be longer with using a riser. Most Mercs I've seen only use one size of boots, so something have to be added to attach to exhaust Y pipe

 

[SeaboldWarrior]

the original intermediate elbows are correct lengths, wrong angle

 

[alldodge]

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