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Bob Johnson
| | Posted on Friday, November 30, 2001 - 08:15 pm: | 
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This week we have finally started to investigate the internal condition of our 1927 Kermath Sea Wolf installed in a 27' Chris-Craft runabout. The engine was not used since 1978. It was not seized (!) and shows very minor rusting on the camshaft and cam followers only. It was drained of oil when laid up, and there seems to be about 1 gallon of oil in the bottom of the pan and a little more in the oil reservoir. No nasty noises when we rolled it over on a wrench. Question... Do we need to replace the existing valve seats with hardened seats to compensate for the lead-free gas? Could the cam and followers be polished clean or do we need a rebuilt cam, since there is minor galling on the lobe tips. All suggestions welcome. |
jmj
| | Posted on Saturday, December 01, 2001 - 08:52 am: |
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Hi!
It's usually recommended to replace the valve seats though there have to be enough material left around the new seat. It's best to make the new seat as small as possible.
The camshaft could be hand grinded with a fine whetstone (knife sharpening tool) if the rust isn't too deep. Grinding away .002" (0.05mm) or .004" will probably not affect the engine power. |
Bruce Hall
| | Posted on Saturday, December 01, 2001 - 10:45 pm: |
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Bob,I think you will find the seats are already very hard.I think marine fuel of the Sea Wolf era was "White Gas" which was unleaded.You might be able to dress the cam and adjust the tappets for compensated valve clearence.Post your question to the Kermath and Sterling engine website. |
Robert Holcomb
| | Posted on Sunday, December 02, 2001 - 06:27 pm: |
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Where is the kermath site at???? |
andrew
| | Posted on Sunday, December 02, 2001 - 06:41 pm: |
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Robert,
Rich Langtry has a site with Kermath information at: http://www.kermath.com/kermath_marine.htm
Also we offer some Kermath manual reprints at here.
Regards,
Andrew |
dave
| | Posted on Saturday, October 19, 2002 - 08:09 am: |
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You might also drop a line to the Antique Boat Museum in Clayton requesting they send you a copy of the Kermath Sea Wolf Manual. I know they have one as I was looking at it a couple of weeks ago. They are in the middle of a move right now so it might take them a bit to locate it.
Regards
Dave |
Brad
| | Posted on Monday, January 06, 2003 - 09:37 pm: |
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Often times the followers on the Kermath sea wolfs are dimpled in and need to be reground for they sjould be a smooth radius outward and the cam sould be done at the same time the shop that does this Lester Prairie engine PH 320 395 2881 the guys name is Les. As for the seats in a Kermath don't worry they are hard enough. Les has done many complete rebuilds on the Kermath seawolfs and nows them well.
P.S. neat motor take care of it |
Dave Doner
Visitor
| | Posted on Sunday, August 22, 2004 - 10:32 pm: |
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I have a Kermath Sea Twin (serial # 11055RG) which I plan to install in a small launch. I would like to obtain information on this engine such as age, as-built photos and/or manual, specifications, etc. |
Bob Johnson
Visitor
| | Posted on Tuesday, September 28, 2004 - 08:27 pm: |
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Finally started our Sea Wolf on Saturday. After some fooling around with the distributor (no spark) we found that the condensor was shorting out on the case. Once fixed, it started right away after a 25 year sleep. Sounds wonderful, especially at the end of the 4 inch exhaust pipe. No thumps, no rattles, just a nice old engine brought back to life. |
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Visitor
| | Posted on Monday, March 06, 2006 - 06:38 pm: |
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Andy S
Visitor
| | Posted on Friday, July 27, 2007 - 08:39 am: |
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Does anyone know if the www.kermath.com website is down or has moved as I can not get it to respond?
Regards
Andy |
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