Mercruiser Alpha One Gen II trim pump bracket question

f575gtc

Cadet
Joined
May 17, 2017
Messages
14
Hello all,

I am not sure if this is under the correct room. I need to get a new bracket for my trim pump on a 2004 Maxum 1800SR, it has an Alpha one Gen II outdrive. My concern is that the bracket that it came with is completely rotted away so I can't really tell what it looked like. It appears to have been the part number, 862548A1 item that looks like this http://i.ebayimg.com/images/g/wh0AAO...Fqc/s-l500.jpg , but mercruiser parts lists both the 862548A1 and 42419A1, http://i.ebayimg.com/images/g/8E0AAO...3J/s-l1600.jpg, as a suitable part and all the places I check for the bracket show one as being interchangeable with the other. Is this the case? 42419A1 is much cheaper than the 862548A1 part number.

Thanks
 

Fun Times

Moderator
Staff member
Joined
May 16, 2009
Messages
8,776
Somewhere right around your year Merc superseded (updated) the part number (bracket design) to your first number 862548A1 so I wouldn't be to surprised if that's what you have in there now.

The first design you're considering and might be less money, has a smaller width to it so it might be hard to hide the old holes as they won't lineup or cover them up/over...Also the old bracket typically had 3 screw holes to the floor on each side while the new one has 2 holes. Depending on what/if you're doing for construction/remodel, You may want to stay with what you have if you'd like to keep the bracket in the same place to hide old holes, etc.

Also come to think of it, I do believe the 2 rear trim pump mounting bolt holes "widths" are slightly different to where the new and old pump body may not match up exactly also if you compare the mounting bolts, Item numbers 29 and 37 in the link below, the bolt thread sizes are different too.
2910-35386 ----SCREW, (.312-18 x 1.00)
3710-98260 ----SCREW, (.375-16 x .620)

Here is a general image with both designs by each other if interested. http://www.mercruiserparts.com/bam/subassembly/30862/2686/190
 
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