290 DP pivot pin retaining bolt thread repair

[SaveCutlass]

I apologize if there are already posts about this topic. I did a quick search and didn't get any relevant results.

I removed my outdrive to get the seals replaced. When I removed the bolts that retain the pivot pins, the threads in the transom housing (might not be correct name) came out with the bolts in a powder form. I was thinking a may be able to install a helicoil, but the threaded portion is at the back portion of the hole. There appears to be a stainless steel bushing on the outward portion of the hole (see pic). To get a helicoil in the back portion, I think I would have to drill/tap through this bushing. I think that would be pretty difficult and also make that bushing inner diameter oversized.

Has anyone else dealt with this or completed a similar repair? Looking for some recommendations on how to do it. Thank you.

First pic shows the area I'm describing circled in red. Second pic is what appears to be a stainless steel bushing in the outward portion of the hole circled in red.

 

[Scott Danforth]

The pivot pin lock bolts are there to keep the pins from coming out. A helicoil is a fine repair

 

[Scott Danforth]

BTW, note the spanner slot on the threaded stainless bushing. most likely to get that out, you will need heat...... alot of heat.

 

[SaveCutlass]

BTW, note the spanner slot on the threaded stainless bushing. most likely to get that out, you will need heat...... alot of heat.

Dang, never got notifications of any replies. Decided I'd better check.

Not necessarily questioning if the heli-coil will be a good repair. Moreso of how do I get it in there.

I will have to look again at the boat, but I'm pretty sure that is not a spanner slot you're seeing in the picture. Just some debris, corrosion, or goofy spot in the pic.

My boat is very similar to yours, minus custom 468 engine I have a 91 Cruisers Rogue 2530, stock 350 and of course the 290 DP

 

[Scott Danforth]

Email notifications haven't worked in a long time.
That is outside of the moderators control and is something on the hose settings

My 1988 housings do not have the little stainless bits. My pivot pins also do not have the slide hammer threaded holes that it should

VP made changes almost every year

If they are not threaded in, they are pressed in. Make a jaw for a small slide hammer and pull them out. Then make the repair and put them back

Technically since my drive is a 290A, yours may be a DP-A1 or even a DP-B. They all have the 290 decal.

 

[SaveCutlass]

Email notifications haven't worked in a long time.
That is outside of the moderators control and is something on the hose settings

My 1988 housings do not have the little stainless bits. My pivot pins also do not have the slide hammer threaded holes that it should

VP made changes almost every year

If they are not threaded in, they are pressed in. Make a jaw for a small slide hammer and pull them out. Then make the repair and put them back

Technically since my drive is a 290A, yours may be a DP-A1 or even a DP-B. They all have the 290 decal.

Thank you for your replies.

Pulled the boat out of storage today and blew the debris out of the holes. It may not be as bad as I thought, now that I can see in there. It appears there are some threads left. If I can find a thread chaser long enough that might be good enough.

 

[Scott Danforth]

See if you can simply use a slightly longer bolt