Rigging Yamaha Motor to Johnson Throttle, Shift, Harness, and Gauges

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Author Topic:   Rigging Yamaha Motor to Johnson Throttle, Shift, Harness, and Gauges

knotflyn posted 02-13-2009 10:33 PM ET (US)
I currently have a 1987 Johnson 70 on my 1987 Montauk 17. I have the chance to get a 2005 Yamaha 90 two-cycle engine for free from my family. What will be involved in switching out these engines? Will any of my OMC gear work? I have a binnacle control, start switch, and gauges. Thanks
jimh posted 02-13-2009 10:40 PM ET (US)
It is unlikely that the wiring harness on the Yamaha engine will have a connector that can mate with the existing wiring harness on your boat rigging. However, the electrical components themselves ought to be quite compatible. If you were skilled and knowledgeable, you could purchase a new wiring harness for the boat that is designed for Yamaha motors, then connect this harness to your existing gauges, key switch, neutral safety switch, kill switch, tachometer, voltmeter, and other gauges. In this way you would be able to re-use some of your existing rigging components.
towboater posted 02-14-2009 03:00 AM ET (US)
Pony up man!!!!
Hellooo? is anybody in there...
Sell your 70 with complete rigging for $500.
Buy new Yamaha rigging. Then, add about $5k value to your boat.
Casco Bay Outrage posted 02-14-2009 10:58 AM ET (US)
Knot -
Check Flounderpounder - www.fpmarine.com - for good prices on harnesses, gauges, key switch and binnacle.
Yamaha has a traditional set of gauges that are relatively inexpensive compared to the digital versions.
I say replace it all.
knotflyn posted 02-14-2009 11:56 AM ET (US)
Thanks for the info from jim and casco bay. As for towboater, if you can not respond with some useful info, and stop the degrading remarks, then all of us can benefit from this forum. Next time keep your negative comments to yourself.
high sierra posted 02-14-2009 12:10 PM ET (US)
Buy all Yamaha rigging. I have done three of these , x brand to y brand and they are not worth the effort. The overall expense will be a lot more than you imagine . high sierra
towboater posted 02-14-2009 02:05 PM ET (US)
"Sell your 70 with complete rigging for $500.
Buy new Yamaha rigging. Then, add about $5k value to your boat."
This is not useful info?
jimh posted 02-15-2009 12:31 AM ET (US)
I concur with the advice to get Yamaha rigging, particularly for the electrical harnesses and gauges. If you intermix brands of harnesses, ignition switches, safety switches, gauges, and so on, you may be able to get a workable configuration that is electrically equivalent to an OEM rigged boat, but you will always have something of a Frankenstein-rigging appearance. It may be a bit harder to find used Yamaha rigging, as those motors seem to last forever.
If your mechanical throttle and shift remote controls are in good condition, you should be able to reuse them if the direction of their motion matches what is needed on the new motor. If the push-pull motion of the shift cables is not compatible, you'll have to replace the shift and throttle, too.

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Author	Topic: Rigging Yamaha Motor to Johnson Throttle, Shift, Harness, and Gauges
knotflyn	posted 02-13-2009 10:33 PM ET (US) I currently have a 1987 Johnson 70 on my 1987 Montauk 17. I have the chance to get a 2005 Yamaha 90 two-cycle engine for free from my family. What will be involved in switching out these engines? Will any of my OMC gear work? I have a binnacle control, start switch, and gauges. Thanks
jimh	posted 02-13-2009 10:40 PM ET (US) It is unlikely that the wiring harness on the Yamaha engine will have a connector that can mate with the existing wiring harness on your boat rigging. However, the electrical components themselves ought to be quite compatible. If you were skilled and knowledgeable, you could purchase a new wiring harness for the boat that is designed for Yamaha motors, then connect this harness to your existing gauges, key switch, neutral safety switch, kill switch, tachometer, voltmeter, and other gauges. In this way you would be able to re-use some of your existing rigging components.
towboater	posted 02-14-2009 03:00 AM ET (US) Pony up man!!!! Hellooo? is anybody in there... Sell your 70 with complete rigging for $500. Buy new Yamaha rigging. Then, add about $5k value to your boat.
Casco Bay Outrage	posted 02-14-2009 10:58 AM ET (US) Knot - Check Flounderpounder - www.fpmarine.com - for good prices on harnesses, gauges, key switch and binnacle. Yamaha has a traditional set of gauges that are relatively inexpensive compared to the digital versions. I say replace it all.
knotflyn	posted 02-14-2009 11:56 AM ET (US) Thanks for the info from jim and casco bay. As for towboater, if you can not respond with some useful info, and stop the degrading remarks, then all of us can benefit from this forum. Next time keep your negative comments to yourself.
high sierra	posted 02-14-2009 12:10 PM ET (US) Buy all Yamaha rigging. I have done three of these , x brand to y brand and they are not worth the effort. The overall expense will be a lot more than you imagine . high sierra
towboater	posted 02-14-2009 02:05 PM ET (US) "Sell your 70 with complete rigging for $500. Buy new Yamaha rigging. Then, add about $5k value to your boat." This is not useful info?
jimh	posted 02-15-2009 12:31 AM ET (US) I concur with the advice to get Yamaha rigging, particularly for the electrical harnesses and gauges. If you intermix brands of harnesses, ignition switches, safety switches, gauges, and so on, you may be able to get a workable configuration that is electrically equivalent to an OEM rigged boat, but you will always have something of a Frankenstein-rigging appearance. It may be a bit harder to find used Yamaha rigging, as those motors seem to last forever. If your mechanical throttle and shift remote controls are in good condition, you should be able to reuse them if the direction of their motion matches what is needed on the new motor. If the push-pull motion of the shift cables is not compatible, you'll have to replace the shift and throttle, too.