Can anyone shed some light on this. I'm negotiating the purchase of '79 27. There is rust in tranny case as well as a lack of fluid. Present owner reports " ran fine when put up this winter ". I assume I will be needing a new transmission. Has anyone recently replaced one on a 1gm10 diesel in a Hunter 27? Is this going to be a jobfor yard or can week end mechanics attempt? What would be the ballpark cost? Thanks
transmission woes
- Thread starter greg2238
- Start date
- Status
- Not open for further replies.
Contact Mack Boring for a REAL cost.
Greg: Contact Mack Boring for a real cost. This may include the labor and materials to get a real cost. I have no idea, but it is NOT cheap.
Greg: Contact Mack Boring for a real cost. This may include the labor and materials to get a real cost. I have no idea, but it is NOT cheap.
look in the engine manual
Doing it yourself should not be to bad but rebuilding the box should be done by a yanmar pro. Most yard mechanics just have yanmar rebuild the box for them. This does require special tools ect. that make it cheaper to have them do the box. But you can pull it. The 1gm repair manual tells you what you want to know and is a great reference book too. get one from the dealer.
Doing it yourself should not be to bad but rebuilding the box should be done by a yanmar pro. Most yard mechanics just have yanmar rebuild the box for them. This does require special tools ect. that make it cheaper to have them do the box. But you can pull it. The 1gm repair manual tells you what you want to know and is a great reference book too. get one from the dealer.
I think a mechanicaly inclined person could.....
Pulling the trans is easy. 1) unbolt the shift cable 13mm & 10mm wrench 2) unblot the coupler, tool undetermined. Could be mm or in depending on what Hunter used. I've seen 14mm, 17mm, 11/16, 9/16 3) pull the shaft off of the trans, watch for water flow thru the packing. 4) unbolt the trans from the engine. 12mm socket on about a 6" extension works well. There 8 bolts circumfrentialy on the bell housing. You MAY need to get forcefull with sliding the trans off the engine. The input shaft could be coroded to the flex plate. Take or send it to a Yanmar shop for rebuild. Install is just the reverse, remembering to put anti-sieze on the input shaft splines. Here's the hard part. If you've never aligned a shaft before, pay the yard to do it, ask them if they will teach you when they are aligning. Pat
Pulling the trans is easy. 1) unbolt the shift cable 13mm & 10mm wrench 2) unblot the coupler, tool undetermined. Could be mm or in depending on what Hunter used. I've seen 14mm, 17mm, 11/16, 9/16 3) pull the shaft off of the trans, watch for water flow thru the packing. 4) unbolt the trans from the engine. 12mm socket on about a 6" extension works well. There 8 bolts circumfrentialy on the bell housing. You MAY need to get forcefull with sliding the trans off the engine. The input shaft could be coroded to the flex plate. Take or send it to a Yanmar shop for rebuild. Install is just the reverse, remembering to put anti-sieze on the input shaft splines. Here's the hard part. If you've never aligned a shaft before, pay the yard to do it, ask them if they will teach you when they are aligning. Pat
Not such a terrible job
Pat's advice is essentialy right on the money. First thing to do on a unit that old is douse everything with penetrating oil and walk away for a week. It is highly unlikely that anyone at your marina is going to willingly tackle disassembly and reassembly of the trans. What you want is to send it or have it sent to Mack Boring in Union, NJ. That is where the work is done, by the people who know how to do it. Bear in mind I am NOT one to recomend sending work out that can be accomplished oneself. The trans rebuild is the only work on my boat (which has been quite extensive) which I have farmed out. When the 2GM gear in my Hunter 33 got to slipping so bad it barely engaged I read through the section in the shop manual, and while not rediculous, it seemed a better idea to bite the bullet and get it done right the first time. As I recall, it cost me around $450, supposedly including consideration for a former employee.
Pat's advice is essentialy right on the money. First thing to do on a unit that old is douse everything with penetrating oil and walk away for a week. It is highly unlikely that anyone at your marina is going to willingly tackle disassembly and reassembly of the trans. What you want is to send it or have it sent to Mack Boring in Union, NJ. That is where the work is done, by the people who know how to do it. Bear in mind I am NOT one to recomend sending work out that can be accomplished oneself. The trans rebuild is the only work on my boat (which has been quite extensive) which I have farmed out. When the 2GM gear in my Hunter 33 got to slipping so bad it barely engaged I read through the section in the shop manual, and while not rediculous, it seemed a better idea to bite the bullet and get it done right the first time. As I recall, it cost me around $450, supposedly including consideration for a former employee.
- Status
- Not open for further replies.