impeller change on mariner 25hp 2005 problem splitting gear linkage

[Dino89]

just moved to devon so want to get my boat enegines ready , so embarking on replacing the impellor on my mariner 25hp and hit this problem how does the gear shift split never come across this type before pictures attached not sure if the pins going through could be grub screws ,looks like the go right through this collar and shat is this standard or a repair from earlier problem splitting , any ideas thanks in advance ,

photos are from both sides of the shaft and the info plate

[Allye]

Hi there,

They are just roll pins, tap out one of them and it’ll come apart easy enough.

[Dino89]

thats great are they tapered or just straight come out in either direction ,thanks for the help appreciate it

[charliee]

straight out I believe

[Dino89]

thanks will be giving it ago with a drill blank as a drift

[Dino89]

neither pin wants to move they have a hole all the way through them , the top one has better access but is not moving at all:-( would heat help or damage anything? or any other ideas or is there a pin compressor/extractor

[Allye]

Yes you want a punch or similar object the correct diameter. They are pennies to replace so can damage it if you like. Not sure heat would do a huge amount. They are sometimes lock wired back in too.

Gain better access by moving gear selector!

[Dino89]

thanks again , will give it another go again tomorrow , where do i get replacements if needed , what are they called?

[Allye]

Called roll pins, you may need a couple of assorted sizes to get the exact one, or take the old one in to a friendly local fixing place.

[Dino89]

Thanks

[Fenlander]

Assuming they are spring or roll pins as per the link below heat isn't as helpful as with solid pins because they spring tension out to take up any crack/gap heating might produce.

It's crucial your drift is flat ended and exactly the right diameter... a bit too large and obviously it won't go through... too small and it will tend to try and drive up in the middle and expend the pin in even tighter.

If you are dealing with a stubborn one it's important the shaft the pin is through is fully supported or the slightest movement will absorb that crucial first shock of the hammer blow. I'd lay the outboard down and set up wooden blocks/packers to support that short bit of shaft.

Also a lump hammer used accurately once and hard to start it will do loads more good than multiple medium hammer blows.

https://www.paigntontools.co.uk/metr...-m2-x-4mm.html

[Dino89]

thanks fenlander for the advice and link , they do have hole through middle but cant see if they are a split spring type but will give it a go tomorrow using the blocks for support