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Author Topic:   Raising Transom to 20-Inch
thebulkinator posted 04-09-2004 12:41 PM ET (US)   Profile for thebulkinator   Send Email to thebulkinator  
I've a 1968 Whaler 13-foot boat that has a 1978 Johnson 2-stroke 30 on it. I've been looking at getting a new or slightly used outboard in the 25-40 horsepower range that is remote (non-tiller) and would fit it. But I have a problem: I don't think any manufacturers make a 15-inch shaft engines anymore. I think I saw a way to raise the transom on the boat 5-inches, but can not remember where. I thought this would be a good place to ask.

Also any suggestions on rigging the new motor would be very helpful. Any motors that would be good for this application. I'd like to keep the cable steering but would like to know the other alternatives. Any pictures or websites would be VERY helpful. Thank you all for your responses, Ben.

andygere posted 04-11-2004 02:41 AM ET (US)     Profile for andygere  Send Email to andygere     
Don't [attempt to modify the transom height]. Nissan/Tohatsu still makes a 40-HP 2-stroke and direct injected 2-stroke in 15-inch shaft with remote control, electric start and power tilt and trim. The other manufacturers seem to have abandoned this configuration for some reason.
Jarhead posted 04-11-2004 09:19 AM ET (US)     Profile for Jarhead  Send Email to Jarhead     
In their 2003 and 2004 catalogs Mercury lists the classic 40- and 25-HP engines as 15- and 20- inch shaft, remote or tiller, electric or manual start.

Would one of these fit the bill?

jimh posted 04-11-2004 10:40 AM ET (US)     Profile for jimh  Send Email to jimh     
For one method of adapting a 20-inch shaft engine to a 15-inch transom height, review the Cetacea Page 56 article:

That Elusive Smell of Forty Year Old Wood

For details of conversion to cable steering on an older 13-foot hull where the curved transom requires a special bracket for installation of the cable steering, consult Cetacea Page 57:

[57 Varieties?

andygere posted 04-11-2004 03:28 PM ET (US)     Profile for andygere  Send Email to andygere     
The classic Mercury 40 does seem to be available in 15" with tilt and trim as an option again. The 15" was not available with tilt and trim for several years. At 204 lbs. for the lightest version (not including the tilt and trim) I think the Mercury is too heavy for a classic 13. The Tohatsu is only 158 lbs. for the lightest version, a huge difference on the transom of an older 13 foot Whaler.
Mullet posted 04-11-2004 08:20 PM ET (US)     Profile for Mullet  Send Email to Mullet     
I have a Merc 40 on a 1968 classic. The weight doesn't seem to make it sit any lower but it will fly. I did change out the old pulley steering system.

thebulkinator, get a 15" motor of whatever brand but don't try to modify that transom. They can be built up and you can also use a jackplate but jackplate = more money, more weight, not original. Just my .02.

13dave posted 04-11-2004 08:50 PM ET (US)     Profile for 13dave  Send Email to 13dave     
i raised the transom on my whaler 13 and it worked out great.i now can use long shafted out boards and the transome never floods when throttling down, i would say raise it but make sure that you enforece it properly.
jimh posted 04-12-2004 11:12 PM ET (US)     Profile for jimh  Send Email to jimh     
Also in the Reference Section is this link:

Rebuilding 13-foot Classic: how to raise the transom to 20-inches on an older hull (off-site link).

keltonkrew posted 04-12-2004 11:39 PM ET (US)     Profile for keltonkrew  Send Email to keltonkrew     
I built mine up out of mohagany, with SS embedded inside. I hope to have some pics up later in the week


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