running a twin engine slower...

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Svend
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Location: Gilford NH

running a twin engine slower...

Post by Svend »

I wanted to throw this question out since there are so many smart boaters, trojan owners out there...

when i have my 2 318's running at absolute slowest speed (idle) my boat still goes 4-4.5 MPH... which i would like to get down to half that... (while still running bother engines, so steering is as precise as it can be)

Any creative ideas?!

Thanks!
1977 Trojan F30 Express, With Dual 318's with Electronic Ignition
Raymarine EV 100 Auto Pilot

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captainmaniac
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Re: running a twin engine slower...

Post by captainmaniac »

Would start by double checking what your idle speed is and can it be reduced a bit. I have been able to get my 360s to idle around 650rpm in the past and get the speed down around 3, but then you are much more affected by any winds or currents. You could also try dropping your trim tabs and see if the extra drag slows you down at all.

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prowlersfish
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Re: running a twin engine slower...

Post by prowlersfish »

I agree check the idle speed your moving fast for idle . Stock props ? And what is your idle speed ?
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77/78 TROJAN F36 Conv.
6BTA Cummins diesels
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Away
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Re: running a twin engine slower...

Post by Away »

My 318's idle at 400 rpms.
F32 Fly 1975

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Svend
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Location: Gilford NH

Re: running a twin engine slower...

Post by Svend »

thanks for the ideas!
"Away" getting 400RPM is pretty good i think...
I am upgrading my 318's to new edlebrock carbs, and new ignition components, distributor, coils, etc... so I am hoping the engine will purr very nicely, and I can get them down from my 600-500 rpm which should help...

thanks for everyones input
1977 Trojan F30 Express, With Dual 318's with Electronic Ignition
Raymarine EV 100 Auto Pilot

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