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| GT 37 EFI Issue http://mudmotortalk.com/mmt_v2/viewtopic.php?f=3&t=72225 |
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| Author: | oldsouthangler [ Tue Mar 20, 2018 9:56 am ] |
| Post subject: | GT 37 EFI Issue |
I purchased a 2016 GT 37EFI in 2016 (new). The motor currently has roughly 220 hours on it and has been meticulously maintained (oil changes and general maintenance). The motor is losing power under a load and bogging down (wont get on a plane and pushing a little higher rpms than usual). When the engine is not under a load it seems to run just fine. The wiring harness was replaced and that seemed to fix the problem temporarily, however now the engine seems to be doing the same thing. The GT certified mechanic cant find what is causing the problem. Has anyone had a similar issue? If so what was the diagnosis? I really appreciate the feedback.Thanks |
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| Author: | bluesky2012 [ Tue Mar 20, 2018 3:33 pm ] |
| Post subject: | Re: GT 37 EFI Issue |
Leakdown test? Sent from my iPhone using Tapatalk Pro |
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| Author: | oldsouthangler [ Tue Mar 20, 2018 3:40 pm ] |
| Post subject: | Re: GT 37 EFI Issue |
Im not exactly sure what test they did, according to the mechanic they have "tried everything"..... I will ask if they specifically did a leak down test. Thanks for the advise |
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| Author: | Will C [ Tue Mar 20, 2018 4:24 pm ] |
| Post subject: | Re: GT 37 EFI Issue |
Where are u from? There is only a handfull of guys around the country that Really know these motors |
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| Author: | oldsouthangler [ Tue Mar 20, 2018 4:45 pm ] |
| Post subject: | Re: GT 37 EFI Issue |
I am in Florida. The boat is at Millers Marine in Ocala area. |
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| Author: | bluesky2012 [ Tue Mar 20, 2018 4:55 pm ] |
| Post subject: | Re: GT 37 EFI Issue |
Also how's the prop? Less hole shot and higher rpms could just be a worn prop. I'd check that and do a leakdown first to see if the valves leaking. Sent from my iPhone using Tapatalk Pro |
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| Author: | oldsouthangler [ Tue Mar 20, 2018 5:09 pm ] |
| Post subject: | Re: GT 37 EFI Issue |
prop is in excellent condition. You can actually feel and hear the motor failing to deliver power. |
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| Author: | MaXXis85 [ Wed Mar 21, 2018 8:47 am ] |
| Post subject: | Re: GT 37 EFI Issue |
You need a proper diagnosis man. Start with mechanics and simple things. No air leaks in fuel lines, valve lash, good plugs. From there verify your fuel pumps are indeed working. Then you can check for fuel pressure (need a special adapter) to verify 39 psi at the fuel rail. Most issues are harness related but they are not the issue all the time... Loaded you need to have everything working as that's when the most demand for air and fuel is needed. |
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| Author: | oldsouthangler [ Wed Mar 21, 2018 8:08 pm ] |
| Post subject: | Re: GT 37 EFI Issue |
Thanks for the help MaXX. I am at the mercy of the mechanic. I hope that those would be the first things they have checked. I will reiterate all of those things next time i speak with them. |
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| Author: | MaXXis85 [ Thu Mar 22, 2018 6:19 am ] |
| Post subject: | Re: GT 37 EFI Issue |
Sadly not many are capable of properly fixing the units. Any competent mechanic who buys the tools can repair it. Briggs has a good tech system to help with issues aswell... |
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