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Old 03-04-2015, 02:46 AM   #1
City: Seattle
Country: USA
Join Date: Mar 2015
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Repower help

I'm trying to find out the best way to repower a Tolly 26 that has a 5.7 mer cruiser that is carbureted. Ideally I'd like to be able to run at 15-18 knots without stressing the motor too much. A plug and play system with my current v-drive and other systems would be the best. Any ideas?

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Old 03-04-2015, 03:08 AM   #2
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City: Biloxi Mississippi
Country: USA
Vessel Name: Patricia Louise II
Vessel Model: 1983 42' Present Sundeck
Join Date: Oct 2007
Posts: 2,450
Look into Marine Power in Ponchatoula, LA. They provide GM based marinized engines and gears. I don't remember the company name to look under to be able to buy direct, but I suggest you call Tyler Baker and he could help you.

1983 Present 42 Sundeck
Twin Lehman 135's

Steve Point Cadet/ Biloxi, Mississippi USA
*Present 42 twin 135 Lehmans
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Old 03-04-2015, 06:46 AM   #3
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Is the current engine big enough to provide the speed you need?

If its just worn out Jasper does good rebuilds .

Factory new the Crusader brand probably does the best engines from new.

But as always you get what you pay for,,
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Old 03-04-2015, 10:09 AM   #4
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City: Tsawwassen/Point Roberts
Country: Canada/USA
Vessel Name: Tolly Roger
Vessel Model: Tollycraft 34 SC
Join Date: May 2014
Posts: 87
Tolly 26 Re Power

Several years ago when we had our 26, I had our 255 Merc rebuilt and upgraded to make it a 383. I was very pleased with it. I blogged about it and you can see it here:
Engine & Transmission Re-Install | The Tolly Roger Blog

I would also suggest you post your question on the Tollycraft Club Forum
Tollycraft Boating Club Forums

There are several people that have recently taken this on including the current club president who I believe had a new Crusader engine installed.

You should get lots of information and answers.
Tolly Roger
1983 Tollycraft 34SC
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Old 03-04-2015, 10:23 AM   #5
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City: Westerly, RI
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Vessel Model: 1999 Mainship 350 Trawler
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The best and easiest replacement is going to be another Mercruiser small block. Either a 5.7 or a 6.2. Either should have the same footprint. They new MPI models are compatible with these drives:

ZF 63A Down Angle
ZF 63IV V-Drive

There are other options including Carb available out there as well.
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Old 03-04-2015, 10:49 AM   #6
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City: Everett Wa
Country: US
Vessel Name: Eagle
Vessel Model: Roughwater 58 pilot house
Join Date: Oct 2007
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More information would be helpful. The first thing I would do is looking at reproping and trim as its a lot cheaper. A less pitch prop would easier on the engine. All three of my boats are under prop.

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