Reply
 
Thread Tools Search this Thread
 
Old 26 October 2011, 18:10   #1
Member
 
Country: UK - England
Town: Birmingham
Make: Avon SR4
Length: 4m +
Engine: Yam 55
Join Date: Jun 2009
Posts: 75
Yamaha 55 conversion to PTT Advice please siezed bolts

Hi i started off with a seriously rusting steering arm that was getting uncomfortably thin in places that i wanted to replace/repair and planned to convert to Power Tilt after Peter 'Boatsandoutboards' on here supplied me with a PTT unit at a bargain price,i've got a 703 control, relays etc

Anyway its gone a bit Teets up now and i would appreciate your advice from those that have carried out similar repairs. I had a messy powerhead removal due to a sheared off/bent bolt which meant a lot of wriggling bending and lifting and i've broken part of the casting for the driveshaft (see pic) i can't decide on whether to try bonding this back on but then risk it breaking off again and causing some more damage inside or as it just seems to be a guide for the shaft whether to just leave it as it is?

Secondly i've only managed to shear off about 6 bolts at the moment but i've now got 2 long bolts on the steering arm which if they shear i've got a alot more to strip down with vast potential for more sheared off bolts in the process and most likely a scrap engine? The
2 bolts in question i've tried to indicate with my finger at each end? The other option i think is to leave this all attached and remove the saddle and manual tilt mechanism and fit this onto the power tilt saddle and rams?

What would you do (if you hadn't got 2 grand spare to buy a decent replacement engine that is?)


Any advice gratefully appreciated regards AL
Attached Thumbnails
Click image for larger version

Name:	steer 1.jpg
Views:	179
Size:	67.7 KB
ID:	63531   Click image for larger version

Name:	steer2.jpg
Views:	159
Size:	48.9 KB
ID:	63532   Click image for larger version

Name:	steer3.jpg
Views:	172
Size:	90.6 KB
ID:	63533   Click image for larger version

Name:	steer4.jpg
Views:	145
Size:	84.3 KB
ID:	63534   Click image for larger version

Name:	steer5.jpg
Views:	144
Size:	89.8 KB
ID:	63535  

__________________

__________________
shoestring is offline   Reply With Quote
Old 26 October 2011, 18:52   #2
Member
 
Country: UK - England
Town: Plymouth
Length: 6m +
Join Date: Mar 2011
Posts: 2,693
For a moment there I thought I was going to be reading the the tilt removal has caused bolts to shear. I've got to say I'm glad it hasn't but I guess that doesn't help much!!! Sounds like a right nuisance.... I hope the tilt is working as expected

Should I start looking for it's midsection :hide

Seriously though my bet is those two long bolts are going to go as well. I've not stripped one on those before but I've had my share of bolts shear on me. Keep me posted

Peter ~ Boatsandoutboards4sale ~ askboatsandoutboards4sale@sky.com ~ 07930 421007
__________________

__________________
Boats&Outboards is offline   Reply With Quote
Old 27 October 2011, 04:59   #3
Member
 
Country: UK - Scotland
Boat name: Wildheart
Make: Humber/Delta Seasafe
Length: 5m +
Engine: Merc 60 Clamshell
MMSI: 235068449
Join Date: Apr 2007
Posts: 4,610
only 6? That's quite impressive!

Yep, I'll lay money on them being gonners. problem is the steering arm is one of the few bits of that engine made of steel (as opposed to alloy or stainless) so it's the first to start rusting & takes the other bits that have to be made of steel to survive the thrashing (the bolts) with it. There is also a chance the AV mount you are almost pointing at in the last pic may have (literally) come unstuck.

That's the bad news. The good news is those legs are common up to about 90 HP, and loads of Mariners use them too, so in a worst case scenario, finding a replacement shouldn't be too difficult. I was halfway to the PT conversion myself when I discoverd the earth strap to the powerhead had broken & it had turned to shortbread. DA Marine in Dundee has (had?) a very solid leg in his bits box, just don't touch the powerhead with a barge pole...... (serial number available if needed!)

If it's any help I have a reasonable nick clamp / swivel assy off a 75 (it came free with the PT I bought!) if you are really stuck. Have a trawl in the "bits 'n'pieces" section for photos - Price negotiable as it's been taking up space for a while now!
__________________
9D280 is offline   Reply With Quote
Old 27 October 2011, 05:04   #4
Member
 
Country: UK - England
Town: Birmingham
Make: Avon SR4
Length: 4m +
Engine: Yam 55
Join Date: Jun 2009
Posts: 75
The Power Tilt works perfectly thanks mate, about the only thing that does at the moment annoying thing is i've actually got the nuts off the end, its just how to draw them through the arm/force the arm off the bolts, i'm trying to be a bit careful with the hammer after the manual said to remove the flywheel to get the power head off? couldn't see why but i thought i'd follow the instructions for once so with the flywheel puller struggling to move it i thought i'd assist it by use of the mallet... and smashed the throttle linkage instead i want my mommy
__________________
shoestring is offline   Reply With Quote
Old 27 October 2011, 06:11   #5
Member
 
Country: UK - England
Town: Birmingham
Make: Avon SR4
Length: 4m +
Engine: Yam 55
Join Date: Jun 2009
Posts: 75
Thanks for the reply, sorry my last post was for Peter! correct my stupidity 9D280 but i'm thinking/do you reckon if i can't remove my old leg from the swivel assembly then can i leave it all attached and remove the swivel assembly instead from my old manual ram & saddle.. then (firstly remove the 'new' ptt swivel) and fix it onto the new PTT saddle...

Only thing i can see is the castings a bit different where the the chrome stop rods? will come to rest on the swivel but the holes are there to take the little buffers?

many thanks AL

other pic Counterfeit Avon badges after a day in the sun
Attached Thumbnails
Click image for larger version

Name:	avon stick.jpg
Views:	129
Size:	53.4 KB
ID:	63540   Click image for larger version

Name:	IMG00458-20111026-1720.jpg
Views:	139
Size:	102.0 KB
ID:	63541  
__________________
shoestring is offline   Reply With Quote
Old 28 October 2011, 04:09   #6
Member
 
Country: UK - Scotland
Boat name: Wildheart
Make: Humber/Delta Seasafe
Length: 5m +
Engine: Merc 60 Clamshell
MMSI: 235068449
Join Date: Apr 2007
Posts: 4,610
Yeah, the swivel bracket s fixed to the clamp assy by nothing more than the steering cable / tilt tube. Fixes to the PTT unit by the big pin at the top of the middle ram and once they are out, the entire swivel assy (or in the case of your corrent engine, the rest of the engine) are free. That was how I was going to do mine, the only reason I stripped the PT off the clamp / swivel on mine was to sell it & reduce the postage for the buyer!

if that pic is what you got attachced to the PT, you are likely going to be a million times easier leaving the the swivel bracket on the engine & replacing the clamps / ram assy.

As for the trim rams (the outer pair that are not fixed to the swivel) they should bear against a couple of "wear plates". Notorious for falling off (the one I got was missing one and a half of them - the remaining half was just wedged in the hole!) but relatively cheap to find & fit.


Edit:
Hang on a minute.... do you have one of the relatively rare last batch of internal ram manual tilt ones with a single "tilt assist ram" in the middle, or does yours have the external rams? If the latter, you will definitly need to remove the leg from the swivel & bolt it onto the PT assy you have there.
__________________
9D280 is offline   Reply With Quote
Old 31 October 2011, 13:09   #7
Member
 
Country: UK - England
Town: Birmingham
Make: Avon SR4
Length: 4m +
Engine: Yam 55
Join Date: Jun 2009
Posts: 75
Sorted...til next time

Many thanks for your advice with this, i was all set to cut through the rusted bolts but checked to see if they were available as they looked a bit specialist and found they were but at 29euro (each) plus p&p i decided against it! In the end i cut through one of the lower mounting bolts as they look a bit easier to replace. This allowed the leg to drop to one side and out/off. All i had to do then was knock the bottom fixing bracket off the splines at the bottom of the shaft and draw it through the swivel bracket, well thats what the manual said! reality was it took an hour with an acetalyene torch and an unbelievable amount of hammering anyway it looks like it should all fit together fine, just got all the sheared bolts to drill & tap etc thanks again AL
__________________

__________________
shoestring is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 14:24.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.