View RSS Feed

"Fresh Air"

Old engine out, planning for the new one

Rate this Entry
Since, for several reasons, this project needed to be done at the slip, I needed to lock the shaft in position. Totally.
It was believed to be well-aligned, and it could not be allowed to move forward and relax the spring-bellows in the PSS seal and allow water to run in.

Since the Olson has a molded frp bulkhead panel right behind the engine, there was room to mount a piece of angle aluminum metal. It was screwed to the bulkhead and then U-bolted to the shaft. We did not not unbolt the old engine or coupler until this was done.

Once the engine was hoisted out we used a rigid wood pattern provided by the Betamarine dealer to position the mounting level for the new engine.
Note that this required both raising each side, and setting a proper angle (about 10 degrees) to let the new mounts rest on.
I should note that the angle was not a change from the former Universal diesel, because that engine used "riser blocks" for all four mounts and the front ones were at least an inch higher than the rear ones.

The new engine mounts are bolted into threaded holes in the top aluminum bar pieces, and the correct angle was accomplished by a shaped piece of rigid foam for each side. The foam was then wrapped in fiberglass.

The aluminum bar stock was also milled to fit around some of the engine parts. Finally the aluminum was hard-coat anodized.

When the new engine was lowered in, the new risers were bolted down into the fiberglass molded bed logs (and into oak underneath) with threaded bolts. These were tapped into new-cut threads. They torqued down very very solidly.

Once the old engine was out I cleaned up the engine pan - not too hard since EY had molded it out with a slick gel coat surface as part of the bed log molding. I cleaned up the sides from ancient glue where the original sound foam was long gone. The starboard side had a quarter inch gap where the teak plywood did not quite meet the fiberglass, and this was filled with thickened epoxy.

The new foam was sealed in with mylar tape on all edges. It was installed with spray glue, and then had fasteners with fender washers added for all corners.

Note: the vice-grip was temporarily there to keep 12 volt grounding connected for powering the bilge pumps (emergency) while the main house bank that resides in front of the engine was removed for several months.
Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	Shaft clamp in place.jpg 
Views:	86 
Size:	81.0 KB 
ID:	24565   Click image for larger version. 

Name:	check install.jpg 
Views:	91 
Size:	69.5 KB 
ID:	24570   Click image for larger version. 

Name:	partial sound foam in.jpg 
Views:	86 
Size:	117.8 KB 
ID:	24567  

Submit "Old engine out, planning for the new one" to Digg Submit "Old engine out, planning for the new one" to Submit "Old engine out, planning for the new one" to StumbleUpon Submit "Old engine out, planning for the new one" to Google Submit "Old engine out, planning for the new one" to Face Book

Updated 06-19-2018 at 01:49 PM by Loren Beach

Tags: None Add / Edit Tags


  1. bigd14's Avatar
    Wow, really nice upgrade! Does the new Beta have a self bleeding fuel system? I just cobbled one together on the M18 and it works like a dream.
  2. Loren Beach's Avatar
    The new-series Kubota engine (Betamarine marinized) does not require an external lift pump like the 1988 engine did. It uses a small (hand) lever-operated diesel pump for pulling diesel thru the lines.
    I have used one of these lever pumps on a larger 150 hp diesel engine and it was a total pain (a tedious pain, at that) to use.
    Our mechanic advised us to keep the old Facet electric lift pump in the system to make bleeding out air easy.

    So, no, the new Beta is not "self bleeding", but it's pretty easy to get the air out.

    For the initial startup, we cheated and first used a small brass hand pump to suck diesel thru the filter and primary lift pump, and then let the lift pump click away. You do have to slightly open a bleed screw on the primary filter. (This is the only place that the 1980's injection fuel-return system was a little bit handier to use.)
    Updated 11-18-2018 at 01:17 PM by Loren Beach